InChI=1S/C18H13NO5/c20-9-1-2-10-11(6-9)14-13-8(5-12-17(14)24-7-23-12)3-4-19-16(13)15(10)18(21)22/h1-2,5-6,19-20H,3-4,7H2,(H,21,22)