InChI=1S/C20H28O3/c1-15(13-19(22)23)7-5-9-17(14-21)10-11-18-16(2)8-6-12-20(18,3)4/h5,7,9-11,13,21H,6,8,12,14H2,1-4H3,(H,22,23)/b7-5+,11-10+,15-13+,17-9+