InChI=1S/C18H34O3/c1-2-3-4-5-6-8-11-14-17(19)15-12-9-7-10-13-16-18(20)21/h6,8,17,19H,2-5,7,9-16H2,1H3,(H,20,21)/b8-6-/t17-/m0/s1