InChI=1S/C20H34O/c1-15(11-14-21)10-13-20(5)16(2)8-9-17-18(20)7-6-12-19(17,3)4/h9,11,16,18,21H,6-8,10,12-14H2,1-5H3/b15-11+/t16-,18+,20+/m0/s1