InChI=1S/C20H28O2/c1-14(12-18(21)22)8-6-11-20(5)13-17-16(15(20)2)9-7-10-19(17,3)4/h6,8,12H,2,7,9-11,13H2,1,3-5H3,(H,21,22)/b8-6+,14-12+/t20-/m1/s1