InChI=1S/C20H17NO9/c1-19(29)6-3-2-4-9(22)10(6)14(24)11-7(19)5-8-13(23)15(25)12(18(21)28)17(27)20(8,30)16(11)26/h2-4,7-8,11,22,25,29-30H,5H2,1H3,(H2,21,28)/t7?,8?,11?,19-,20+/m1/s1