InChI=1S/C20H32O2/c1-7-18(4)13-14(21)16-19(5)11-8-10-17(2,3)15(19)9-12-20(16,6)22-18/h7,15-16H,1,8-13H2,2-6H3/t15-,16+,18-,19-,20+/m0/s1