InChI=1S/C33H28O17/c34-15-4-1-12(2-5-15)32(46)48-11-22-27(43)29(45)31(50-33(47)14-8-20(39)26(42)21(40)9-14)30(49-22)24-19(38)10-18(37)23(28(24)44)25(41)13-3-6-16(35)17(36)7-13/h1-10,22,27,29-31,34-40,42-45H,11H2