InChI=1S/C18H30O4/c1-2-3-9-13-16-18(22-16)15(19)12-10-7-5-4-6-8-11-14-17(20)21/h3,9-10,12,15-16,18-19H,2,4-8,11,13-14H2,1H3,(H,20,21)/b9-3-,12-10-/t15-,16+,18+/m1/s1