InChI=1S/C27H32O17/c28-8-14-16(32)18(34)21(37)27(42-14)43-23-13(41-26-22(38)19(35)20(36)24(44-26)25(39)40)7-12(31)15(17(23)33)11(30)6-3-9-1-4-10(29)5-2-9/h1-7,11,14,16,18-22,24,26-38H,8H2,(H,39,40)/b6-3+