InChI=1S/C19H15NO7/c1-7-3-11(22)16-17(24)15-9(4-8(21)5-12(15)26-2)14(18(16)27-7)10-6-13(23)20-19(10)25/h3-5,10,22,24H,6H2,1-2H3,(H,20,23,25)/t10-/m1/s1