InChI=1S/C20H30O2/c1-12-13-6-7-15-19(4)9-5-8-18(2,3)16(19)14(21)11-20(15,10-13)17(12)22/h13-16,21H,1,5-11H2,2-4H3/t13-,14+,15+,16-,19+,20+/m0/s1