Using CCOC(=O)Cn1cc(C[C@@H](NC(=O)OC(C)(C)C)C(=O)OCc2ccccc2)c2ccccc21 to produce CCOC(=O)Cn1cc(C[C@@H](NC(=O)OC(C)(C)C)C(=O)O)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.