InChI=1S/C20H28O3/c1-14(7-6-8-15(2)11-19(22)23)9-10-18-16(3)12-17(21)13-20(18,4)5/h6-11,17,21H,12-13H2,1-5H3,(H,22,23)/b8-6+,10-9+,14-7-,15-11+