InChI=1S/C20H32O2/c1-3-20(22)11-9-18-17-6-4-13-12-14(21)5-7-15(13)16(17)8-10-19(18,20)2/h13,15-18,22H,3-12H2,1-2H3/t13-,15?,16?,17?,18?,19?,20+/m0/s1