Using COC(=O)[C@@H](CO)NC(=O)OCc1ccccc1, COC(C)(C)OC to produce COC(=O)[C@H]1COC(C)(C)N1C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.