InChI=1S/C20H17NO9/c1-5-6-3-2-4-7(22)9(6)13(23)10-8(5)14(24)12-16(26)15(25)11(19(21)29)18(28)20(12,30)17(10)27/h2-5,8,12,14,22,24-25,27,30H,1H3,(H2,21,29)/t5?,8-,12+,14?,20+/m1/s1