Using O=S1(=O)c2ccccc2N(c2ccc(OCc3ccccc3)cc2)c2ccccc21 to produce O=S1(=O)c2ccccc2N(c2ccc(O)cc2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.