InChI=1S/C33H28O18/c34-14-3-1-11(2-4-14)24(41)22-15(35)9-16(36)23(28(22)45)30-31(51-33(48)13-7-19(39)26(43)20(40)8-13)29(46)27(44)21(50-30)10-49-32(47)12-5-17(37)25(42)18(38)6-12/h1-9,21,27,29-31,34-40,42-46H,10H2