InChI=1S/C19H13NO6/c20-16-13-9(5-6-21)7-12-18(26-8-25-12)14(13)10-3-1-2-4-11(10)15(16)17(22)19(23)24/h1-4,6-7H,5,8,20H2,(H,23,24)