InChI=1S/C18H13NO6/c1-19-10-4-8-7(2-3-11-16(8)25-11)14-13(10)9(15(20)18(21)22)5-12-17(14)24-6-23-12/h2-5,11,16,19H,6H2,1H3,(H,21,22)