InChI=1S/C20H28O2/c1-5-6-7-15-11-18(21)20(19(22)12-15)17-10-14(4)8-9-16(17)13(2)3/h10-12,16-17,21-22H,2,5-9H2,1,3-4H3/t16-,17+/m0/s1