InChI=1S/C20H28O2/c1-13-11-20-10-7-15-18(2,16(20)6-5-14(13)12-20)8-4-9-19(15,3)17(21)22/h7,10,14-16H,1,4-6,8-9,11-12H2,2-3H3,(H,21,22)