Using COC(=O)[C@@H](NC(=O)COc1ccc(Cl)cc1)C(C)C to produce COC(=O)[C@H](C(C)C)N(Cl)C(=O)COc1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.