InChI=1S/C33H28O18/c34-16-4-1-14(8-17(16)35)9-23(32(46)51-33-28(42)26(40)27(41)29(50-33)30(43)44)48-25(39)6-3-13-2-5-21(20(38)7-13)47-24-11-15-10-18(36)19(37)12-22(15)49-31(24)45/h1-8,10-12,23,26-29,33-38,40-42H,9H2,(H,43,44)/b6-3+