InChI=1S/C20H26O3/c1-14-6-4-8-16(3)19-18(11-10-14)17(13-23-20(19)22)9-5-7-15(2)12-21/h5-7,9,18-19,21H,2-4,8,10-13H2,1H3/b7-5+,14-6+,17-9-/t18-,19+/m1/s1