InChI=1S/C20H30O3/c1-18(2)9-4-10-19(3)16(18)7-11-20(14-23-20)17(19)6-5-15(13-22)8-12-21/h5,12-13,16-17H,4,6-11,14H2,1-3H3/b15-5+