InChI=1S/C27H32O17/c1-2-3-6-11-10-5-4-7-12(16(10)25(38)40-11)41-27-21(35)22(17(31)13(42-27)9-39-15(30)8-14(28)29)43-26-20(34)18(32)19(33)23(44-26)24(36)37/h4-7,13,17-23,26-27,31-35H,2-3,8-9H2,1H3,(H,28,29)(H,36,37)/b11-6+