InChI=1S/C25H40O4/c1-17(8-6-9-18(2)11-12-23(27)28)10-7-14-25(5)15-13-21-16-22(26)19(3)20(4)24(21)29-25/h16-18,26H,6-15H2,1-5H3,(H,27,28)/t17-,18+,25+/m0/s1