InChI=1S/C23H32O8/c1-2-17(24)15-13-11-9-7-5-3-4-6-8-10-12-14-16-30-23-20(27)18(25)19(26)21(31-23)22(28)29/h3,5,18-21,23,25-27H,2,4,6-8,10,12,14,16H2,1H3,(H,28,29)/b5-3+