Using O=C1NC(=O)c2ccccc21, CC(=O)Oc1ccc2cc(CBr)c(=O)oc2c1 to produce CC(=O)Oc1ccc2cc(CN3C(=O)c4ccccc4C3=O)c(=O)oc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.