Using CC(C)(Cc1c[nH]c2c(OCc3ccccc3)cccc12)NC(=O)OC(C)(C)C to produce CC(C)(Cc1c[nH]c2c(O)cccc12)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.