InChI=1S/C20H28O3/c1-18-7-4-12(21)10-16(18)17(22)11-13-14(18)5-8-19(2)15(13)6-9-20(19,3)23/h4,7,10,13-15,17,22-23H,5-6,8-9,11H2,1-3H3/t13-,14+,15+,17-,18-,19+,20+/m1/s1