InChI=1S/C30H24O14/c31-15-10-18(33)24-19(34)12-21(42-22(24)11-15)14-3-5-16(6-4-14)41-23(35)8-2-13-1-7-20(17(32)9-13)43-30-27(38)25(36)26(37)28(44-30)29(39)40/h1-12,25-28,30-33,36-38H,(H,39,40)/b8-2+