InChI=1S/C20H26O3/c1-3-16-20(23-19(2)22)17-14-12-10-8-6-4-5-7-9-11-13-15-18-21/h6,8,10,12-13,15,20-21H,3,11,14,16-18H2,1-2H3/b8-6+,12-10+,15-13-