Using COC(=O)C(CN(C)Cc1ccc(Cl)c(Cl)c1)NC(=O)OC(C)(C)C to produce CN(Cc1ccc(Cl)c(Cl)c1)CC(NC(=O)OC(C)(C)C)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.