InChI=1S/C20H32O2/c1-15(10-13-21)6-8-17-16(2)7-9-18-19(3,14-22)11-5-12-20(17,18)4/h10,14,17-18,21H,2,5-9,11-13H2,1,3-4H3/b15-10+/t17-,18+,19+,20+/m0/s1