Using O=S1(=O)NCCNc2ccc(Oc3ccc(OCc4ccccc4)cc3)cc21 to produce O=S1(=O)NCCNc2ccc(Oc3ccc(O)cc3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.