InChI=1S/C20H34O2/c1-14-8-10-18-19(3,4)11-6-12-20(18,5)16(14)9-7-15(2)17(22)13-21/h17-18,21-22H,2,6-13H2,1,3-5H3/t17-,18-,20+/m1/s1