InChI=1S/C33H26O21/c34-12-1-8(2-13(35)21(12)40)29(46)53-28-24(43)18(51-33(26(28)45)54-30(47)9-3-14(36)22(41)15(37)4-9)7-50-31(48)11-6-17(39)27-20(11)19-10(32(49)52-27)5-16(38)23(42)25(19)44/h1-5,11,18,24,26,28,33-38,40-45H,6-7H2