Using O=C1Nc2ccccc2CCC1NC(CCc1ccccc1)C(=O)OCc1ccccc1, CC(C)(C)OC(=O)CBr to produce CC(C)(C)OC(=O)CN1C(=O)C(NC(CCc2ccccc2)C(=O)OCc2ccccc2)CCc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.