<?xml version="1.0" encoding="UTF-8"?>
<metabolite>
  <version>1.0</version>
  <creation_date>2016-09-30 22:18:40 UTC</creation_date>
  <update_date>2020-06-04 20:42:57 UTC</update_date>
  <accession>BMDB0000030</accession>
  <secondary_accessions>
    <accession>BMDB00030</accession>
  </secondary_accessions>
  <name>Biotin</name>
  <description>Biotin, also known as D-biotin or biotin ratiopharm, belongs to the class of organic compounds known as biotin and derivatives. These are organic compounds containing a ureido (tetrahydroimidizalone) ring fused with a tetrahydrothiophene ring. Biotin is a drug which is used for nutritional supplementation, also for treating dietary shortage or imbalance. Biotin exists as a solid, possibly soluble (in water), and an extremely weak basic (essentially neutral) compound (based on its pKa) molecule. Biotin exists in all living species, ranging from bacteria to humans. In cattle, biotin is involved in the metabolic pathway called the biotin metabolism pathway. Biotin is a potentially toxic compound.</description>
  <synonyms>
    <synonym>(+)-cis-Hexahydro-2-oxo-1H-thieno[3,4]imidazole-4-valeric acid</synonym>
    <synonym>(3AS,4S,6ar)-hexahydro-2-oxo-1H-thieno[3,4-D]imidazole-4-valeric acid</synonym>
    <synonym>5-(2-Oxohexahydro-1H-thieno[3,4-D]imidazol-4-yl)pentanoic acid</synonym>
    <synonym>Biotina</synonym>
    <synonym>Biotine</synonym>
    <synonym>Biotinum</synonym>
    <synonym>cis-(+)-Tetrahydro-2-oxothieno[3,4]imidazoline-4-valeric acid</synonym>
    <synonym>cis-Hexahydro-2-oxo-1H-thieno(3,4)imidazole-4-valeric acid</synonym>
    <synonym>cis-Tetrahydro-2-oxothieno(3,4-D)imidazoline-4-valeric acid</synonym>
    <synonym>Coenzyme R</synonym>
    <synonym>D-(+)-Biotin</synonym>
    <synonym>D-Biotin</synonym>
    <synonym>Vitamin b7</synonym>
    <synonym>Vitamin H</synonym>
    <synonym>Bioepiderm</synonym>
    <synonym>(+)-cis-Hexahydro-2-oxo-1H-thieno[3,4]imidazole-4-valerate</synonym>
    <synonym>(3AS,4S,6ar)-hexahydro-2-oxo-1H-thieno[3,4-D]imidazole-4-valerate</synonym>
    <synonym>5-(2-Oxohexahydro-1H-thieno[3,4-D]imidazol-4-yl)pentanoate</synonym>
    <synonym>cis-(+)-Tetrahydro-2-oxothieno[3,4]imidazoline-4-valerate</synonym>
    <synonym>cis-Hexahydro-2-oxo-1H-thieno(3,4)imidazole-4-valerate</synonym>
    <synonym>cis-Tetrahydro-2-oxothieno(3,4-D)imidazoline-4-valerate</synonym>
    <synonym>(+)-Biotin</synonym>
    <synonym>-(+)-Biotin</synonym>
    <synonym>1SWK</synonym>
    <synonym>1SWN</synonym>
    <synonym>1SWR</synonym>
    <synonym>Biodermatin</synonym>
    <synonym>Bios H</synonym>
    <synonym>Bios II</synonym>
    <synonym>D(+)-Biotin</synonym>
    <synonym>D-Biotin factor S</synonym>
    <synonym>delta-(+)-Biotin</synonym>
    <synonym>delta-Biotin</synonym>
    <synonym>delta-Biotin factor S</synonym>
    <synonym>Factor S</synonym>
    <synonym>Factor S (vitamin)</synonym>
    <synonym>Hexahydro-2-oxo-1H-thieno(3,4-D)imidazole-4-pentanoate</synonym>
    <synonym>Hexahydro-2-oxo-1H-thieno(3,4-D)imidazole-4-pentanoic acid</synonym>
    <synonym>Hexahydro-2-oxo-[3as-(3aa,4b,6aa)]-1H-thieno[3,4-D]imidazole-4-pentanoate</synonym>
    <synonym>Hexahydro-2-oxo-[3as-(3aa,4b,6aa)]-1H-thieno[3,4-D]imidazole-4-pentanoic acid</synonym>
    <synonym>Hexahydro-2-oxo-[3as-(3alpha,4beta,6alpha)]-1H-thieno[3,4-D]imidazole-4-pentanoate</synonym>
    <synonym>Hexahydro-2-oxo-[3as-(3alpha,4beta,6alpha)]-1H-thieno[3,4-D]imidazole-4-pentanoic acid</synonym>
    <synonym>Lutavit H2</synonym>
    <synonym>Meribin</synonym>
    <synonym>Rovimix H 2</synonym>
    <synonym>Vitamin-H</synonym>
    <synonym>Biotin hermes brand</synonym>
    <synonym>Biotin roche brand</synonym>
    <synonym>Biotin simons brand</synonym>
    <synonym>Biotin strathmann brand</synonym>
    <synonym>Biotin ziethen brand</synonym>
    <synonym>Biotin ratiopharm</synonym>
    <synonym>Roche brand OF biotin</synonym>
    <synonym>Roche, biotine</synonym>
    <synonym>E+b pharma brand OF biotin</synonym>
    <synonym>Medobiotin</synonym>
    <synonym>Biokur</synonym>
    <synonym>Biotinratiopharm</synonym>
    <synonym>Gelfert, biotin</synonym>
    <synonym>Hermes brand OF biotin</synonym>
    <synonym>Hermes, biotin</synonym>
    <synonym>Medopharm brand OF biotin</synonym>
    <synonym>Ratiopharm brand OF biotin</synonym>
    <synonym>Biocur brand OF biotin</synonym>
    <synonym>Biotin dermapharm brand</synonym>
    <synonym>Biotine roche</synonym>
    <synonym>Deacura</synonym>
    <synonym>Dermapharm brand OF biotin</synonym>
    <synonym>Gabunat</synonym>
    <synonym>Medebiotin</synonym>
    <synonym>Rombellin</synonym>
    <synonym>Ziethen brand OF biotin</synonym>
    <synonym>Biotin biocur brand</synonym>
    <synonym>Biotin gelfert</synonym>
    <synonym>Biotin hermes</synonym>
    <synonym>Biotin medopharm brand</synonym>
    <synonym>Biotin ratiopharm brand</synonym>
    <synonym>Biotin-ratiopharm</synonym>
    <synonym>H, Vitamin</synonym>
    <synonym>Medea brand OF biotin sodium salt</synonym>
    <synonym>Simons brand OF biotin</synonym>
    <synonym>Strathmann brand OF biotin</synonym>
  </synonyms>
  <chemical_formula>C10H16N2O3S</chemical_formula>
  <average_molecular_weight>244.311</average_molecular_weight>
  <monisotopic_moleculate_weight>244.088163078</monisotopic_moleculate_weight>
  <iupac_name>5-[(3aS,4S,6aR)-2-oxo-hexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanoic acid</iupac_name>
  <traditional_iupac>5-[(3aS,4S,6aR)-2-oxo-hexahydrothieno[3,4-d]imidazol-4-yl]pentanoic acid</traditional_iupac>
  <cas_registry_number>58-85-5</cas_registry_number>
  <smiles>[H][C@]12CS[C@@H](CCCCC(O)=O)[C@@]1([H])NC(=O)N2</smiles>
  <inchi>InChI=1S/C10H16N2O3S/c13-8(14)4-2-1-3-7-9-6(5-16-7)11-10(15)12-9/h6-7,9H,1-5H2,(H,13,14)(H2,11,12,15)/t6-,7-,9-/m0/s1</inchi>
  <inchikey>YBJHBAHKTGYVGT-ZKWXMUAHSA-N</inchikey>
  <taxonomy>
    <description> belongs to the class of organic compounds known as biotin and derivatives. These are organic compounds containing a ureido (tetrahydroimidizalone) ring fused with a tetrahydrothiophene ring.</description>
    <kingdom>Organic compounds</kingdom>
    <super_class>Organoheterocyclic compounds</super_class>
    <class>Biotin and derivatives</class>
    <sub_class/>
    <direct_parent>Biotin and derivatives</direct_parent>
    <alternative_parents>
      <alternative_parent>Azacyclic compounds</alternative_parent>
      <alternative_parent>Carbonyl compounds</alternative_parent>
      <alternative_parent>Carboximidamides</alternative_parent>
      <alternative_parent>Carboxylic acids</alternative_parent>
      <alternative_parent>Dialkylthioethers</alternative_parent>
      <alternative_parent>Heterocyclic fatty acids</alternative_parent>
      <alternative_parent>Hydrocarbon derivatives</alternative_parent>
      <alternative_parent>Imidazolines</alternative_parent>
      <alternative_parent>Imidazolyl carboxylic acids and derivatives</alternative_parent>
      <alternative_parent>Isoureas</alternative_parent>
      <alternative_parent>Medium-chain fatty acids</alternative_parent>
      <alternative_parent>Monocarboxylic acids and derivatives</alternative_parent>
      <alternative_parent>Organic oxides</alternative_parent>
      <alternative_parent>Organopnictogen compounds</alternative_parent>
      <alternative_parent>Propargyl-type 1,3-dipolar organic compounds</alternative_parent>
      <alternative_parent>Thia fatty acids</alternative_parent>
      <alternative_parent>Thiolanes</alternative_parent>
    </alternative_parents>
    <substituents>
      <substituent>2-imidazoline</substituent>
      <substituent>Aliphatic heteropolycyclic compound</substituent>
      <substituent>Azacycle</substituent>
      <substituent>Biotin</substituent>
      <substituent>Carbonyl group</substituent>
      <substituent>Carboximidamide</substituent>
      <substituent>Carboxylic acid</substituent>
      <substituent>Carboxylic acid derivative</substituent>
      <substituent>Dialkylthioether</substituent>
      <substituent>Fatty acid</substituent>
      <substituent>Fatty acyl</substituent>
      <substituent>Heterocyclic fatty acid</substituent>
      <substituent>Hydrocarbon derivative</substituent>
      <substituent>Imidazolyl carboxylic acid derivative</substituent>
      <substituent>Isourea</substituent>
      <substituent>Medium-chain fatty acid</substituent>
      <substituent>Monocarboxylic acid or derivatives</substituent>
      <substituent>Organic 1,3-dipolar compound</substituent>
      <substituent>Organic nitrogen compound</substituent>
      <substituent>Organic oxide</substituent>
      <substituent>Organic oxygen compound</substituent>
      <substituent>Organonitrogen compound</substituent>
      <substituent>Organooxygen compound</substituent>
      <substituent>Organopnictogen compound</substituent>
      <substituent>Propargyl-type 1,3-dipolar organic compound</substituent>
      <substituent>Thia fatty acid</substituent>
      <substituent>Thioether</substituent>
      <substituent>Thiolane</substituent>
    </substituents>
    <molecular_framework>Aliphatic heteropolycyclic compounds</molecular_framework>
    <external_descriptors>
      <external_descriptor>Water-soluble vitamins</external_descriptor>
      <external_descriptor>biotins</external_descriptor>
    </external_descriptors>
  </taxonomy>
  <experimental_properties>
    <state>Solid</state>
    <property>
      <kind>melting_point</kind>
      <value>232 °C</value>
      <source/>
    </property>
    <property>
      <kind>water_solubility</kind>
      <value>0.22 mg/mL at 25 °C</value>
      <source/>
    </property>
  </experimental_properties>
  <predicted_properties>
    <property>
      <kind>logp</kind>
      <value>0.17</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logs</kind>
      <value>-2.30</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logp</kind>
      <value>0.32</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>pka_strongest_acidic</kind>
      <value>4.4</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>pka_strongest_basic</kind>
      <value>-1.9</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>iupac</kind>
      <value>5-[(3aS,4S,6aR)-2-oxo-hexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanoic acid</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>average_mass</kind>
      <value>244.311</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>mono_mass</kind>
      <value>244.088163078</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>smiles</kind>
      <value>[H][C@]12CS[C@@H](CCCCC(O)=O)[C@@]1([H])NC(=O)N2</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formula</kind>
      <value>C10H16N2O3S</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchi</kind>
      <value>InChI=1S/C10H16N2O3S/c13-8(14)4-2-1-3-7-9-6(5-16-7)11-10(15)12-9/h6-7,9H,1-5H2,(H,13,14)(H2,11,12,15)/t6-,7-,9-/m0/s1</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchikey</kind>
      <value>YBJHBAHKTGYVGT-ZKWXMUAHSA-N</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polar_surface_area</kind>
      <value>78.43</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>refractivity</kind>
      <value>60.05</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polarizability</kind>
      <value>24.92</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>rotatable_bond_count</kind>
      <value>5</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>acceptor_count</kind>
      <value>3</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>donor_count</kind>
      <value>3</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>physiological_charge</kind>
      <value>-1</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formal_charge</kind>
      <value>0</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>number_of_rings</kind>
      <value>2</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>bioavailability</kind>
      <value>1</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>rule_of_five</kind>
      <value>Yes</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>ghose_filter</kind>
      <value>Yes</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>veber_rule</kind>
      <value>Yes</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>mddr_like_rule</kind>
      <value>Yes</value>
      <source>ChemAxon</source>
    </property>
  </predicted_properties>
  <pathways>
    <pathway>
      <name>Alanine Metabolism</name>
      <smpdb_id>SMP0087164</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Ammonia Recycling</name>
      <smpdb_id>SMP0087177</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Biotin Metabolism</name>
      <smpdb_id>SMP0087183</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Citric Acid Cycle</name>
      <smpdb_id>SMP0087163</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Fatty Acid Biosynthesis</name>
      <smpdb_id>SMP0087257</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Gluconeogenesis</name>
      <smpdb_id>SMP0087223</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Glutamate Metabolism</name>
      <smpdb_id>SMP0087169</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>LPS and Citrate Signaling and Inflammation</name>
      <smpdb_id>SMP0120946</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Propanoate Metabolism</name>
      <smpdb_id>SMP0087248</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Pyruvate Metabolism</name>
      <smpdb_id>SMP0087231</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Threonine and 2-Oxobutanoate Degradation</name>
      <smpdb_id>SMP0087262</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Transfer of Acetyl Groups into Mitochondria</name>
      <smpdb_id>SMP0087254</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Valine, Leucine, and Isoleucine Degradation</name>
      <smpdb_id>SMP0087234</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Warburg Effect</name>
      <smpdb_id>SMP0087270</smpdb_id>
      <kegg_map_id/>
    </pathway>
  </pathways>
  <spectra>
    <spectrum>
      <type>Specdb::EiMs</type>
      <spectrum_id>1972</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrTwoD</type>
      <spectrum_id>932</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrTwoD</type>
      <spectrum_id>936</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>857</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>1994</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>3215</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>30490</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>30963</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>37254</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>130453</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>138187</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>1047151</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>1047153</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>1047155</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>1047157</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>1047158</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>1039</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>4827</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>4828</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>294995</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>294996</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>294997</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>294998</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>294999</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295000</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295001</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295002</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295003</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295004</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295005</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295006</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295007</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295008</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295009</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295010</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295011</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295012</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295013</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>295014</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>6162</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>6163</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>6164</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>6165</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>6166</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>6167</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>6168</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>6169</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>6170</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>179691</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>179692</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>179693</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>182025</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>182026</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>182027</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>374645</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>436925</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>436926</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>437350</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>437351</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>437352</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>437353</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>437354</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>438622</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>439629</spectrum_id>
    </spectrum>
  </spectra>
  <normal_concentrations>
    <concentration>
      <biospecimen>All Tissues</biospecimen>
      <concentration_value/>
      <concentration_units/>
      <references>
        <reference>
          <reference_text>Wishart DS, Feunang YD, Marcu A, Guo AC, Liang K, Vazquez-Fresno R, Sajed T, Johnson D, Li C, Karu N, Sayeeda Z, Lo E, Assempour N, Berjanskii M, Singhal S, Arndt D, Liang Y, Badran H, Grant J, Serra-Cayuela A, Liu Y, Mandal R, Neveu V, Pon A, Knox C, Wilson M, Manach C, Scalbert A: HMDB 4.0: the human metabolome database for 2018. Nucleic Acids Res. 2018 Jan 4;46(D1):D608-D617. doi: 10.1093/nar/gkx1089.</reference_text>
          <pubmed_id>29140435</pubmed_id>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Liver</biospecimen>
      <concentration_value/>
      <concentration_units/>
      <comment>8 multiparous Chinese Holstein dairy cows fed in the Hangzhou Hangjiang Dairy Farm based on the milk production under alfalfa hay based diets. Detection used gas chromatography time-of-flight/mass spectrometry (GC-TOF/MS) platform.</comment>
      <references>
        <reference>
          <reference_text>Sun HZ, Zhou M, Wang O, Chen Y, Liu JX, Guan LL: Multi-omics reveals functional genomic and metabolic mechanisms of milk production and quality in dairy cows. Bioinformatics. 2020 Apr 15;36(8):2530-2537. doi: 10.1093/bioinformatics/btz951.</reference_text>
          <pubmed_id>31873721</pubmed_id>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Liver</biospecimen>
      <concentration_value/>
      <concentration_units/>
      <comment>8 multiparous Chinese Holstein dairy cows fed in the Hangzhou Hangjiang Dairy Farm based on the milk production under corn stover based diets. Detection used gas chromatography time-of-flight/mass spectrometry (GC-TOF/MS) platform.</comment>
      <references>
        <reference>
          <reference_text>Sun HZ, Zhou M, Wang O, Chen Y, Liu JX, Guan LL: Multi-omics reveals functional genomic and metabolic mechanisms of milk production and quality in dairy cows. Bioinformatics. 2020 Apr 15;36(8):2530-2537. doi: 10.1093/bioinformatics/btz951.</reference_text>
          <pubmed_id>31873721</pubmed_id>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Milk</biospecimen>
      <concentration_value>0.041</concentration_value>
      <concentration_units>uM</concentration_units>
      <references>
        <reference>
          <reference_text>Park, Y. W; Juárez, Manuela ; Ramos, M.; Haenlein, G. F. W.. Physico-chemical characteristics of goat and sheep milk. Small Ruminant Res.(2007) 68:88-113   doi: 10.1016/j.smallrumres.2006.09.013</reference_text>
          <pubmed_id/>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Milk</biospecimen>
      <concentration_value>0.080 +/- 0.003</concentration_value>
      <concentration_units>uM</concentration_units>
      <comment>Quantified by LC-MS/MS in 1% milk</comment>
      <references>
        <reference>
          <reference_text>Foroutan A, Guo AC, Vazquez-Fresno R, Lipfert M, Zhang L, Zheng J, Badran H, Budinski Z, Mandal R, Ametaj BN, Wishart DS: Chemical Composition of Commercial Cow's Milk. J Agric Food Chem. 2019 Apr 17. doi: 10.1021/acs.jafc.9b00204.</reference_text>
          <pubmed_id>30994344</pubmed_id>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Milk</biospecimen>
      <concentration_value>0.097 +/- 0.004</concentration_value>
      <concentration_units>uM</concentration_units>
      <comment>Quantified by LC-MS/MS in 2% milk</comment>
      <references>
        <reference>
          <reference_text>Foroutan A, Guo AC, Vazquez-Fresno R, Lipfert M, Zhang L, Zheng J, Badran H, Budinski Z, Mandal R, Ametaj BN, Wishart DS: Chemical Composition of Commercial Cow's Milk. J Agric Food Chem. 2019 Apr 17. doi: 10.1021/acs.jafc.9b00204.</reference_text>
          <pubmed_id>30994344</pubmed_id>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Milk</biospecimen>
      <concentration_value>0.090 +/- 0.003</concentration_value>
      <concentration_units>uM</concentration_units>
      <comment>Quantified by LC-MS/MS in 3.25% milk</comment>
      <references>
        <reference>
          <reference_text>Foroutan A, Guo AC, Vazquez-Fresno R, Lipfert M, Zhang L, Zheng J, Badran H, Budinski Z, Mandal R, Ametaj BN, Wishart DS: Chemical Composition of Commercial Cow's Milk. J Agric Food Chem. 2019 Apr 17. doi: 10.1021/acs.jafc.9b00204.</reference_text>
          <pubmed_id>30994344</pubmed_id>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Milk</biospecimen>
      <concentration_value>0.090 +/- 0.002</concentration_value>
      <concentration_units>uM</concentration_units>
      <comment>Quantified by LC-MS/MS in skim milk</comment>
      <references>
        <reference>
          <reference_text>Foroutan A, Guo AC, Vazquez-Fresno R, Lipfert M, Zhang L, Zheng J, Badran H, Budinski Z, Mandal R, Ametaj BN, Wishart DS: Chemical Composition of Commercial Cow's Milk. J Agric Food Chem. 2019 Apr 17. doi: 10.1021/acs.jafc.9b00204.</reference_text>
          <pubmed_id>30994344</pubmed_id>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Milk</biospecimen>
      <concentration_value>0.086</concentration_value>
      <concentration_units>uM</concentration_units>
      <comment>Milk, partly skim, conventional (not organic), 1.5 % fat</comment>
      <references>
        <reference>
          <reference_text>Fooddata+, The Technical University of Denmark (DTU): https://frida.fooddata.dk/QueryFood.php?fn=milk&amp;lang=en</reference_text>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Milk</biospecimen>
      <concentration_value>0.041</concentration_value>
      <concentration_units>uM</concentration_units>
      <comment>Milk, partly skim, organic, 1.5 % fat</comment>
      <references>
        <reference>
          <reference_text>Fooddata+, The Technical University of Denmark (DTU): https://frida.fooddata.dk/QueryFood.php?fn=milk&amp;lang=en</reference_text>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Milk</biospecimen>
      <concentration_value>0.082</concentration_value>
      <concentration_units>uM</concentration_units>
      <comment>Skim milk</comment>
      <references>
        <reference>
          <reference_text>Fooddata+, The Technical University of Denmark (DTU): https://frida.fooddata.dk/QueryFood.php?fn=milk&amp;lang=en</reference_text>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Milk</biospecimen>
      <concentration_value>0.078</concentration_value>
      <concentration_units>uM</concentration_units>
      <comment>Milk, skim, 0.5 % fat</comment>
      <references>
        <reference>
          <reference_text>Fooddata+, The Technical University of Denmark (DTU): https://frida.fooddata.dk/QueryFood.php?fn=milk&amp;lang=en</reference_text>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Milk</biospecimen>
      <concentration_value>0.082</concentration_value>
      <concentration_units>uM</concentration_units>
      <comment>Milk, skim, organic</comment>
      <references>
        <reference>
          <reference_text>Fooddata+, The Technical University of Denmark (DTU): https://frida.fooddata.dk/QueryFood.php?fn=milk&amp;lang=en</reference_text>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Milk</biospecimen>
      <concentration_value>0.082</concentration_value>
      <concentration_units>uM</concentration_units>
      <comment>Milk, whole, 3.5, (UHT), % fat</comment>
      <references>
        <reference>
          <reference_text>Fooddata+, The Technical University of Denmark (DTU): https://frida.fooddata.dk/QueryFood.php?fn=milk&amp;lang=en</reference_text>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Milk</biospecimen>
      <concentration_value>0.064</concentration_value>
      <concentration_units>uM</concentration_units>
      <comment>Milk, whole, conventional (not organic), 3.5 % fat</comment>
      <references>
        <reference>
          <reference_text>Fooddata+, The Technical University of Denmark (DTU): https://frida.fooddata.dk/QueryFood.php?fn=milk&amp;lang=en</reference_text>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Milk</biospecimen>
      <concentration_value>0.041</concentration_value>
      <concentration_units>uM</concentration_units>
      <comment>Milk, whole, organic, 3.5 % fat</comment>
      <references>
        <reference>
          <reference_text>Fooddata+, The Technical University of Denmark (DTU): https://frida.fooddata.dk/QueryFood.php?fn=milk&amp;lang=en</reference_text>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Prostate Tissue</biospecimen>
      <concentration_value/>
      <concentration_units/>
      <references>
        <reference>
          <reference_text>Wishart DS, Feunang YD, Marcu A, Guo AC, Liang K, Vazquez-Fresno R, Sajed T, Johnson D, Li C, Karu N, Sayeeda Z, Lo E, Assempour N, Berjanskii M, Singhal S, Arndt D, Liang Y, Badran H, Grant J, Serra-Cayuela A, Liu Y, Mandal R, Neveu V, Pon A, Knox C, Wilson M, Manach C, Scalbert A: HMDB 4.0: the human metabolome database for 2018. Nucleic Acids Res. 2018 Jan 4;46(D1):D608-D617. doi: 10.1093/nar/gkx1089.</reference_text>
          <pubmed_id>29140435</pubmed_id>
        </reference>
      </references>
    </concentration>
  </normal_concentrations>
  <kegg_id>C00120</kegg_id>
  <drugbank_id>DB00121</drugbank_id>
  <chemspider_id>149962</chemspider_id>
  <pubchem_compound_id>171548</pubchem_compound_id>
  <pdbe_id/>
  <chebi_id>15956</chebi_id>
  <foodb_id>FDB014510</foodb_id>
  <meta_cyc_id>BIOTIN</meta_cyc_id>
  <knapsack_id>C00000756</knapsack_id>
  <wikipedia_id>Biotin</wikipedia_id>
  <phenol_explorer_compound_id/>
  <bigg_id>33931</bigg_id>
  <metlin_id>243</metlin_id>
  <synthesis_reference>Corey, E. J.; Mehrotra, Mukund M.  A simple and enantioselective synthesis of (+)-biotin.  Tetrahedron Letters  (1988),  29(1),  57-60.</synthesis_reference>
  <general_references>
    <reference>
      <reference_text>Park, Y. W; Juárez, Manuela ; Ramos, M.; Haenlein, G. F. W.. Physico-chemical characteristics of goat and sheep milk. Small Ruminant Res.(2007) 68:88-113   doi: 10.1016/j.smallrumres.2006.09.013</reference_text>
    </reference>
    <reference>
      <reference_text>A. Foroutan et al. The Chemical Composition of Commercial Cow's Milk (in preparation)</reference_text>
    </reference>
    <reference>
      <reference_text>Fooddata+, The Technical University of Denmark (DTU): https://frida.fooddata.dk/QueryFood.php?fn=milk&amp;lang=en</reference_text>
    </reference>
  </general_references>
  <protein_associations>
    <protein>
      <protein_accession>BMDBP00204</protein_accession>
      <name>Acetyl-CoA carboxylase 1</name>
      <uniprot_id>Q9TTS3</uniprot_id>
      <gene_name>ACACA</gene_name>
      <protein_type>Enzyme</protein_type>
    </protein>
    <protein>
      <protein_accession>BMDBP00615</protein_accession>
      <name>Pyruvate carboxylase, mitochondrial</name>
      <uniprot_id>Q29RK2</uniprot_id>
      <gene_name>PC</gene_name>
      <protein_type>Enzyme</protein_type>
    </protein>
    <protein>
      <protein_accession>BMDBP00822</protein_accession>
      <name>Pyruvate carboxylase</name>
      <uniprot_id>Q861T5</uniprot_id>
      <gene_name/>
      <protein_type>Enzyme</protein_type>
    </protein>
    <protein>
      <protein_accession>BMDBP01240</protein_accession>
      <name>Biotinidase</name>
      <uniprot_id>A6QQ07</uniprot_id>
      <gene_name>BTD</gene_name>
      <protein_type>Enzyme</protein_type>
    </protein>
    <protein>
      <protein_accession>BMDBP02007</protein_accession>
      <name>PCCA protein</name>
      <uniprot_id>A4FV90</uniprot_id>
      <gene_name>PCCA</gene_name>
      <protein_type>Enzyme</protein_type>
    </protein>
    <protein>
      <protein_accession>BMDBP02008</protein_accession>
      <name>Acetyl-CoA carboxylase, type beta</name>
      <uniprot_id>Q50I03</uniprot_id>
      <gene_name>acacb</gene_name>
      <protein_type>Enzyme</protein_type>
    </protein>
    <protein>
      <protein_accession>BMDBP02009</protein_accession>
      <name>Acetyl-CoA carboxylase, type beta</name>
      <uniprot_id>Q50I04</uniprot_id>
      <gene_name>acacb</gene_name>
      <protein_type>Enzyme</protein_type>
    </protein>
    <protein>
      <protein_accession>BMDBP02876</protein_accession>
      <name>LOC534247 protein</name>
      <uniprot_id>A8E662</uniprot_id>
      <gene_name>LOC534247</gene_name>
      <protein_type>Enzyme</protein_type>
    </protein>
  </protein_associations>
</metabolite>
