Using NCc1ccc(C(=O)O)cc1Br, O=C(OCC1c2ccccc2-c2ccccc21)ON1C(=O)CCC1=O to produce O=C(NCc1ccc(C(=O)O)cc1Br)OCC1c2ccccc2-c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.