InChI=1S/C23H30O8/c1-3-17(24)15-13-11-9-7-5-4-6-8-10-12-14-16(2)30-23-20(27)18(25)19(26)21(31-23)22(28)29/h3-5,16,18-21,23,25-27H,1,6-8,10,12,14H2,2H3,(H,28,29)/b5-4+