InChI=1/C16H15BrN2O4/c1-22-12-5-3-10(14(8-12)23-2)4-6-15(20)19-13-7-11(17)9-18-16(13)21/h3-9H,1-2H3,(H,18,21)(H,19,20)/b6-4+/f/h18-19H ABC28D6F7D775C6F