InChI=1S/C18H30O4/c1-2-3-4-8-11-14-17(22-21)15-12-9-6-5-7-10-13-16-18(19)20/h3-4,11-12,14-15,17,21H,2,5-10,13,16H2,1H3,(H,19,20)/p-1/b4-3-,14-11-,15-12-/t17-/m0/s1