InChI=1S/C20H30/c1-16(2)20-14-12-18(4)10-6-8-17(3)9-7-11-19(5)13-15-20/h8,10-12,14,20H,1,6-7,9,13,15H2,2-5H3/b14-12+,17-8?,18-10?,19-11?