Using O=C1c2ccccc2C(=O)N1c1n[nH]c2ccc(OCc3ccccc3)cc12 to produce O=C1c2ccccc2C(=O)N1c1n[nH]c2ccc(O)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.