InChI=1S/C20H30O2/c1-15(2)19-12-13-22-20(19)14-17(4)10-6-8-16(3)9-7-11-18(5)21/h9-10,12-13,15H,6-8,11,14H2,1-5H3/b16-9+,17-10+