InChI=1S/C29H26O15/c30-16-8-14(9-17(31)22(16)35)27(39)43-26-25(38)24(37)20(12-41-21(34)7-6-13-4-2-1-3-5-13)42-29(26)44-28(40)15-10-18(32)23(36)19(33)11-15/h1-11,20,24-26,29-33,35-38H,12H2/b7-6+