InChI=1S/C18H30O4/c1-2-3-4-5-6-7-8-9-12-16(19)15-17(20)13-10-11-14-18(21)22/h6-7,9,12,16,19H,2-5,8,10-11,13-15H2,1H3,(H,21,22)/b7-6-,12-9-/t16-/m0/s1