InChI=1S/C27H24O18/c28-12-1-9(2-13(29)19(12)34)23(37)42-7-18-22(45-25(39)11-5-16(32)21(36)17(33)6-11)27(41,26(40)44-18)8-43-24(38)10-3-14(30)20(35)15(31)4-10/h1-6,18,22,26,28-36,40-41H,7-8H2