InChI=1S/C20H32O4/c1-2-3-9-12-17(21)15-16-19-18(24-19)13-10-7-5-4-6-8-11-14-20(22)23/h4,6-7,10,15-19,21H,2-3,5,8-9,11-14H2,1H3,(H,22,23)/t17-,18?,19?/m0/s1