InChI=1S/C20H32/c1-15-7-6-8-16(2)10-12-19-13-18(11-9-15)17(3)14-20(19,4)5/h7,10,12,17-18H,6,8-9,11,13-14H2,1-5H3/b15-7-,16-10-,19-12+