InChI=1S/C27H54O4/c1-25(2)21-19-17-15-13-11-9-7-5-3-4-6-8-10-12-14-16-18-20-22-27(30)31-24-26(29)23-28/h25-26,28-29H,3-24H2,1-2H3/t26-/m1/s1