InChI=1S/C20H26O2/c1-15(7-6-8-16(2)13-14-21)9-11-18-17(3)10-12-19(22)20(18,4)5/h6-9,11,13-14H,10,12H2,1-5H3/b8-6+,11-9+,15-7+,16-13+