InChI=1S/C27H22O18/c28-9-1-6(2-10(29)16(9)32)24(38)45-23-21(37)22-13(43-27(23)41)5-42-25(39)7-3-11(30)17(33)19(35)14(7)15-8(26(40)44-22)4-12(31)18(34)20(15)36/h1-4,13,21-23,27-37,41H,5H2