Using CC(C)(C)OC(=O)Nc1ccc(Cl)cc1OCc1ccccc1, COC(=O)CBr to produce COC(=O)CN(C(=O)OC(C)(C)C)c1ccc(Cl)cc1OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.