InChI=1S/C20H24O3/c1-3-20(23)9-7-16-14-5-4-12-10-17(21)18(22)11-15(12)13(14)6-8-19(16,20)2/h1,10-11,13-14,16,21-23H,4-9H2,2H3/t13?,14?,16?,19?,20-/m0/s1