Using CCOC(=O)c1[nH]c2ccc(OCc3ccccc3)cc2c1CCCNC(=O)OC(C)(C)C to produce CCOC(=O)c1[nH]c2ccc(O)cc2c1CCCNC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.