InChI=1S/C20H32/c1-16(2)20-14-12-18(4)10-6-8-17(3)9-7-11-19(5)13-15-20/h8,11-12,14,16H,6-7,9-10,13,15H2,1-5H3/b17-8+,18-12+,19-11?,20-14+