Using CC(C)(C)OC(=O)CNCc1ccc(Br)cc1, CC(C)(C)OC(=O)Nc1ccc(C(=O)O)cc1 to produce CC(C)(C)OC(=O)CN(Cc1ccc(Br)cc1)C(=O)c1ccc(NC(=O)OC(C)(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.