InChI=1S/C23H30O8/c1-3-5-6-11-14-17(15-12-9-7-8-10-13-16(24)4-2)30-23-20(27)18(25)19(26)21(31-23)22(28)29/h4,12,15,17-21,23,25-27H,2-3,5-6,9,11,14H2,1H3,(H,28,29)/b15-12+