Using O=C(NNC(=O)OCc1ccccc1)OCc1ccccc1, CC(C)(C)OC(=O)C(Br)CCBr to produce CC(C)(C)OC(=O)C1CCN(C(=O)OCc2ccccc2)N1C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.