InChI=1S/C18H32O4/c1-2-3-4-5-8-11-14-17(22-21)15-12-9-6-7-10-13-16-18(19)20/h8,11-12,15,17,21H,2-7,9-10,13-14,16H2,1H3,(H,19,20)/p-1/b11-8-,15-12+/t17-/m0/s1