InChI=1S/C20H28O3/c1-13(11-17-19(23-17)15(3)12-18(21)22)8-9-16-14(2)7-6-10-20(16,4)5/h8-9,11-12,17,19H,6-7,10H2,1-5H3,(H,21,22)/b9-8+,13-11-,15-12+