InChI=1S/C19H13NO6/c21-9-1-2-10-11(6-9)14-13-8(5-12-18(14)26-7-25-12)3-4-20-16(13)15(10)17(22)19(23)24/h1-2,5-6,20-21H,3-4,7H2,(H,23,24)