Using CCOC(=O)CBr, O=C1Nc2ccccc2CCCC1N1C(=O)c2ccccc2C1=O to produce CCOC(=O)CN1C(=O)C(N2C(=O)c3ccccc3C2=O)CCCc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.