InChI=1S/C28H44O4/c1-16(2)17(3)7-8-18(4)20-9-10-21-24(20,5)13-14-27-25(6)12-11-19(29)15-26(25)23(31-26)22(30)28(21,27)32-27/h7-8,16-23,29-30H,9-15H2,1-6H3/b8-7+