InChI=1S/C27H28O18/c1-6-14(31)17(34)20(37)26(41-6)44-23-16(33)13-9(28)4-8(42-27-21(38)18(35)19(36)24(45-27)25(39)40)5-12(13)43-22(23)7-2-10(29)15(32)11(30)3-7/h2-6,14,17-21,24,26-32,34-38H,1H3,(H,39,40)