InChI=1S/C20H24O3/c1-17(9-5-6-10-18(2)13-8-16-21)11-7-12-19(3)14-15-20(22)23-4/h5-16H,1-4H3/b6-5+,11-7+,13-8+,15-14+,17-9+,18-10+,19-12-