InChI=1S/C21H14Br2N2O3/c1-27-21(26)11-5-3-2-4-10(11)16-12-6-8-14(24)17(22)19(12)28-20-13(16)7-9-15(25)18(20)23/h2-9,24H,25H2,1H3