Using C[C@@H](C(=O)OC(C)(C)C)N1C(=O)c2ccccc2C1=O to produce C[C@@H](C(=O)OC(C)(C)C)N1C(=O)c2ccccc2C1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.