Using COC(=O)c1ccccc1C[C@H](CC(=O)OC(C)(C)C)NC(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)C[C@@H](Cc1ccccc1C(=O)O)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.