InChI=1S/C33H30O18/c34-17-5-1-15(10-19(17)36)12-23(30(43)44)49-25(39)8-4-14-3-7-22(21(38)9-14)48-24(13-16-2-6-18(35)20(37)11-16)32(47)51-33-28(42)26(40)27(41)29(50-33)31(45)46/h1-11,13,23,26-29,33-38,40-42H,12H2,(H,43,44)(H,45,46)/b8-4+,24-13-