Using CCOC(=O)CN1C(=O)C(Br)CCc2ccccc21, CCOC(=O)C(N)CCc1ccccc1 to produce CCOC(=O)CN1C(=O)C(NC(CCc2ccccc2)C(=O)OCC)CCc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.