InChI=1S/C18H26O3/c1-2-3-4-5-6-7-8-11-14-17(19)15-12-9-10-13-16-18(20)21/h5-6,17,19H,2-4,9-10,12-13,15-16H2,1H3,(H,20,21)/b6-5-