Using O=C1NC(=O)c2ccccc21, CCOC(=O)c1ccc2cc(CCCCBr)oc2c1 to produce CCOC(=O)c1ccc2cc(CCCCN3C(=O)c4ccccc4C3=O)oc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.