Using COC(=O)c1cccc2c1c1c(OC)c3ccccc3cc1n2Cc1ccccc1 to produce COC(=O)c1cccc2c1c1c(O)c3ccccc3cc1n2Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.