Using CC(C)(C)OC(=O)[C@H](N)c1ccccc1, COC(=O)Cl to produce COC(=O)N[C@@H](C(=O)OC(C)(C)C)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.