InChI=1S/C18H28O3/c1-2-3-13-16-17(21-16)14-11-9-7-5-4-6-8-10-12-15-18(19)20/h11,14,16-17H,2-6,8,10,12-13,15H2,1H3,(H,19,20)/b14-11-