<?xml version="1.0" encoding="UTF-8"?>
<metabolite>
  <version>1.0</version>
  <creation_date>2016-09-30 22:47:41 UTC</creation_date>
  <update_date>2020-05-11 20:56:45 UTC</update_date>
  <accession>BMDB0001562</accession>
  <secondary_accessions>
    <accession>BMDB01562</accession>
  </secondary_accessions>
  <name>N5-Formyl-H4F</name>
  <description>N5-Formyl-THF, also known as n5-formyl-thf or n5-formyl-thf, calcium, belongs to the class of organic compounds known as tetrahydrofolic acids. These are heterocyclic compounds based on the 5,6,7,8-tetrahydropteroic acid skeleton conjugated with at least one L-glutamic acid unit. N5-Formyl-THF exists as a solid, possibly soluble (in water), and a moderately basic compound (based on its pKa) molecule. N5-Formyl-THF exists in all living species, ranging from bacteria to humans. N5-Formyl-THF participates in a number of enzymatic reactions, within cattle. In particular, N5-Formyl-THF and L-glutamic acid can be converted into tetrahydrofolic acid and N-formyl-L-glutamic acid; which is mediated by the enzyme formimidoyltransferase-cyclodeaminase. In addition, N5-Formyl-THF can be converted into 5,10-methenyltetrahydrofolic acid; which is catalyzed by the enzyme N5-formyl-thf cyclo-ligase. In cattle, N5-formyl-THF is involved in the metabolic pathway called the folate metabolism pathway.</description>
  <synonyms>
    <synonym>Leucovorin</synonym>
    <synonym>Rescuvolin</synonym>
    <synonym>5-Formyltetrahydrofolate</synonym>
    <synonym>L(-)-5-Formyl-5,6,7,8-tetrahydrofolic acid</synonym>
    <synonym>5-Formyltetrahydrofolic acid</synonym>
    <synonym>L(-)-5-Formyl-5,6,7,8-tetrahydrofolate</synonym>
    <synonym>(6R,S)-5-Formyltetrahydrofolate</synonym>
    <synonym>10-Formyl-7,8-dihydrofolate</synonym>
    <synonym>10-Formyl-7,8-dihydrofolic acid</synonym>
    <synonym>5-Formyl-5,6,7,8-tetrahydrofolate</synonym>
    <synonym>5-Formyl-5,6,7,8-tetrahydrofolic acid</synonym>
    <synonym>5-Formyltetrahydropteroylglutamate</synonym>
    <synonym>5-Formyltetrahydropteroylglutamic acid</synonym>
    <synonym>Folinate</synonym>
    <synonym>Folinic acid</synonym>
    <synonym>Folinic acid-SF</synonym>
    <synonym>L-Leucovorin</synonym>
    <synonym>L-N-[P-[[(2-amino-5-Formyl-5,6,7,8-tetrahydro-4-hydroxy-6-pteridinyl)methyl]amino]benzoyl]-glutamic acid</synonym>
    <synonym>Leucal</synonym>
    <synonym>Levoleucovorin</synonym>
    <synonym>N5-Formyl-5,6,7,8-tetrahydrofolate</synonym>
    <synonym>N5-Formyl-5,6,7,8-tetrahydrofolic acid</synonym>
    <synonym>N5-Formyltetrahydrofolate</synonym>
    <synonym>N5-Formyltetrahydrofolic acid</synonym>
    <synonym>Welcovorin</synonym>
    <synonym>Acid, folinic</synonym>
    <synonym>Folinate, calcium</synonym>
    <synonym>Leucovorin, (D)-isomer</synonym>
    <synonym>Leucovorin, (DL)-isomer</synonym>
    <synonym>Leucovorin, calcium (1:1) salt</synonym>
    <synonym>5 Formyltetrahydrofolate</synonym>
    <synonym>Citrovorum factor</synonym>
    <synonym>Factor, citrovorum</synonym>
    <synonym>Folinic acid SF</synonym>
    <synonym>Leucovorin, calcium (1:1) salt, pentahydrate</synonym>
    <synonym>Leukovorin</synonym>
    <synonym>N(5)-Formyltetrahydrofolate</synonym>
    <synonym>Leucovorin, (R)-isomer</synonym>
    <synonym>Leucovorin, calcium (1:1) salt, (DL)-isomer</synonym>
    <synonym>Leukovorum</synonym>
    <synonym>Monosodium salt leucovorin</synonym>
    <synonym>Wellcovorin</synonym>
    <synonym>5 Formyltetrahydropteroylglutamate</synonym>
    <synonym>Calcium folinate</synonym>
    <synonym>Calcium leucovorin</synonym>
    <synonym>Leucovorin, calcium</synonym>
    <synonym>Leucovorin, monosodium salt</synonym>
    <synonym>5-Formlyl-5,6,7,8-tetrahydrofolate,calcium salt</synonym>
  </synonyms>
  <chemical_formula>C20H23N7O7</chemical_formula>
  <average_molecular_weight>473.4393</average_molecular_weight>
  <monisotopic_moleculate_weight>473.165896125</monisotopic_moleculate_weight>
  <iupac_name>2-[(4-{[(2-amino-5-formyl-4-oxo-3,4,5,6,7,8-hexahydropteridin-6-yl)methyl]amino}phenyl)formamido]pentanedioic acid</iupac_name>
  <traditional_iupac>2-[(4-{[(2-amino-5-formyl-4-oxo-3,6,7,8-tetrahydropteridin-6-yl)methyl]amino}phenyl)formamido]pentanedioic acid</traditional_iupac>
  <cas_registry_number>58-05-9</cas_registry_number>
  <smiles>OC(=O)CCC(NC(=O)C1=CC=C(NCC2CNC3=C(N2C=O)C(O)=NC(=N)N3)C=C1)C(O)=O</smiles>
  <inchi>InChI=1S/C20H23N7O7/c21-20-25-16-15(18(32)26-20)27(9-28)12(8-23-16)7-22-11-3-1-10(2-4-11)17(31)24-13(19(33)34)5-6-14(29)30/h1-4,9,12-13,22H,5-8H2,(H,24,31)(H,29,30)(H,33,34)(H4,21,23,25,26,32)</inchi>
  <inchikey>VVIAGPKUTFNRDU-UHFFFAOYSA-N</inchikey>
  <taxonomy>
    <description> belongs to the class of organic compounds known as tetrahydrofolic acids. These are heterocyclic compounds based on the 5,6,7,8-tetrahydropteroic acid skeleton conjugated with at least one L-glutamic acid unit.</description>
    <kingdom>Organic compounds</kingdom>
    <super_class>Organoheterocyclic compounds</super_class>
    <class>Pteridines and derivatives</class>
    <sub_class>Pterins and derivatives</sub_class>
    <direct_parent>Tetrahydrofolic acids</direct_parent>
    <alternative_parents>
      <alternative_parent>Amino acids</alternative_parent>
      <alternative_parent>Aminobenzamides</alternative_parent>
      <alternative_parent>Aminopyrimidines and derivatives</alternative_parent>
      <alternative_parent>Aniline and substituted anilines</alternative_parent>
      <alternative_parent>Azacyclic compounds</alternative_parent>
      <alternative_parent>Benzoyl derivatives</alternative_parent>
      <alternative_parent>Carbonyl compounds</alternative_parent>
      <alternative_parent>Carboxylic acids</alternative_parent>
      <alternative_parent>Dicarboxylic acids and derivatives</alternative_parent>
      <alternative_parent>Glutamic acid and derivatives</alternative_parent>
      <alternative_parent>Heteroaromatic compounds</alternative_parent>
      <alternative_parent>Hippuric acids</alternative_parent>
      <alternative_parent>Hydrocarbon derivatives</alternative_parent>
      <alternative_parent>N-acyl-alpha amino acids</alternative_parent>
      <alternative_parent>Organic oxides</alternative_parent>
      <alternative_parent>Organopnictogen compounds</alternative_parent>
      <alternative_parent>Phenylalkylamines</alternative_parent>
      <alternative_parent>Primary amines</alternative_parent>
      <alternative_parent>Pyrimidones</alternative_parent>
      <alternative_parent>Secondary alkylarylamines</alternative_parent>
      <alternative_parent>Secondary carboxylic acid amides</alternative_parent>
      <alternative_parent>Tertiary carboxylic acid amides</alternative_parent>
      <alternative_parent>Vinylogous amides</alternative_parent>
    </alternative_parents>
    <substituents>
      <substituent>Alpha-amino acid or derivatives</substituent>
      <substituent>Amine</substituent>
      <substituent>Amino acid</substituent>
      <substituent>Amino acid or derivatives</substituent>
      <substituent>Aminobenzamide</substituent>
      <substituent>Aminobenzoic acid or derivatives</substituent>
      <substituent>Aminopyrimidine</substituent>
      <substituent>Aniline or substituted anilines</substituent>
      <substituent>Aromatic heteropolycyclic compound</substituent>
      <substituent>Azacycle</substituent>
      <substituent>Benzamide</substituent>
      <substituent>Benzenoid</substituent>
      <substituent>Benzoic acid or derivatives</substituent>
      <substituent>Benzoyl</substituent>
      <substituent>Carbonyl group</substituent>
      <substituent>Carboxamide group</substituent>
      <substituent>Carboxylic acid</substituent>
      <substituent>Carboxylic acid derivative</substituent>
      <substituent>Dicarboxylic acid or derivatives</substituent>
      <substituent>Glutamic acid or derivatives</substituent>
      <substituent>Heteroaromatic compound</substituent>
      <substituent>Hippuric acid</substituent>
      <substituent>Hippuric acid or derivatives</substituent>
      <substituent>Hydrocarbon derivative</substituent>
      <substituent>Monocyclic benzene moiety</substituent>
      <substituent>N-acyl-alpha amino acid or derivatives</substituent>
      <substituent>N-acyl-alpha-amino acid</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>Phenylalkylamine</substituent>
      <substituent>Primary amine</substituent>
      <substituent>Pyrimidine</substituent>
      <substituent>Pyrimidone</substituent>
      <substituent>Secondary aliphatic/aromatic amine</substituent>
      <substituent>Secondary amine</substituent>
      <substituent>Secondary carboxylic acid amide</substituent>
      <substituent>Tertiary carboxylic acid amide</substituent>
      <substituent>Tetrahydrofolic acid</substituent>
      <substituent>Vinylogous amide</substituent>
    </substituents>
    <molecular_framework>Aromatic heteropolycyclic compounds</molecular_framework>
    <external_descriptors>
    </external_descriptors>
  </taxonomy>
  <experimental_properties>
    <state>Solid</state>
  </experimental_properties>
  <predicted_properties>
    <property>
      <kind>logp</kind>
      <value>-1.56</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logs</kind>
      <value>-3.43</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logp</kind>
      <value>-2.3</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>pka_strongest_acidic</kind>
      <value>3.47</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>pka_strongest_basic</kind>
      <value>2.81</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>iupac</kind>
      <value>2-[(4-{[(2-amino-5-formyl-4-oxo-3,4,5,6,7,8-hexahydropteridin-6-yl)methyl]amino}phenyl)formamido]pentanedioic acid</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>average_mass</kind>
      <value>473.4393</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>mono_mass</kind>
      <value>473.165896125</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>smiles</kind>
      <value>OC(=O)CCC(NC(=O)C1=CC=C(NCC2CNC3=C(N2C=O)C(O)=NC(=N)N3)C=C1)C(O)=O</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formula</kind>
      <value>C20H23N7O7</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchi</kind>
      <value>InChI=1S/C20H23N7O7/c21-20-25-16-15(18(32)26-20)27(9-28)12(8-23-16)7-22-11-3-1-10(2-4-11)17(31)24-13(19(33)34)5-6-14(29)30/h1-4,9,12-13,22H,5-8H2,(H,24,31)(H,29,30)(H,33,34)(H4,21,23,25,26,32)</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchikey</kind>
      <value>VVIAGPKUTFNRDU-UHFFFAOYSA-N</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polar_surface_area</kind>
      <value>215.55</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>refractivity</kind>
      <value>126.66</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polarizability</kind>
      <value>46.54</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>rotatable_bond_count</kind>
      <value>9</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>acceptor_count</kind>
      <value>11</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>donor_count</kind>
      <value>7</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>physiological_charge</kind>
      <value>-2</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formal_charge</kind>
      <value>0</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>number_of_rings</kind>
      <value>3</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>bioavailability</kind>
      <value>0</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>Folate Metabolism</name>
      <smpdb_id>SMP0087196</smpdb_id>
      <kegg_map_id/>
    </pathway>
  </pathways>
  <spectra>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201667</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201668</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201669</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201670</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201671</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201672</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201673</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201674</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201675</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201676</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201677</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201678</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201679</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201680</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201681</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201682</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201683</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201684</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201685</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>201686</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>26219</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>26220</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>26221</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>32777</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>32778</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>32779</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>3409760</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>3409761</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>3409762</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>3409763</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>3409764</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>3409765</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>25520</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>38127</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>117810</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>127258</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>128849</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829601</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829602</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829603</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829604</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829605</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829606</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829607</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829608</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829609</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829610</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829611</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829612</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829613</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829614</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829615</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829616</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829617</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829618</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829619</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>829620</spectrum_id>
    </spectrum>
  </spectra>
  <normal_concentrations>
    <concentration>
      <biospecimen>Bladder</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>Fibroblasts</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>Pancreas</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>Testis</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>
  <chemspider_id>140</chemspider_id>
  <drugbank_id/>
  <pubchem_compound_id/>
  <kegg_id>C03479</kegg_id>
  <foodb_id>FDB022689</foodb_id>
  <chebi_id/>
  <pdbe_id/>
  <wikipedia_id/>
  <phenol_explorer_compound_id/>
  <meta_cyc_id/>
  <knapsack_id/>
  <bigg_id/>
  <metlin_id/>
  <synthesis_reference>Zakrzewski, Sigmund F.; Sansone, Annette M.  Preparation of folinic acid (N5-formyltetrahydro folic acid).    Methods Enzymol.  (1971),  18(Pt. B),  731-3. </synthesis_reference>
  <general_references>
  </general_references>
  <protein_associations>
  </protein_associations>
</metabolite>
