Using O=C1NC(=O)c2ccccc21, CCOP(=O)(Cc1ccccc1CBr)OCC to produce CCOP(=O)(Cc1ccccc1CN1C(=O)c2ccccc2C1=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.