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