Using COP(C)(=O)OC, COC(=O)[C@H](Cc1ccccc1)NC(=O)OC(C)(C)C to produce COP(=O)(CC(=O)[C@H](Cc1ccccc1)NC(=O)OC(C)(C)C)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.