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