InChI=1S/C20H24O2/c1-14(2)7-6-8-15(3)11-12-16-13-19(21)17-9-4-5-10-18(17)20(16)22/h4-5,7,9-11,13,21-22H,6,8,12H2,1-3H3/b15-11+