InChI=1S/C20H28O3/c1-11(2)13-9-15(22)17-18-16-12(10-23-18)14(21)5-6-19(16,3)7-8-20(13,17)4/h11,13,17-18H,5-10H2,1-4H3/t13-,17-,18+,19+,20-/m1/s1