Using CCOC(=O)c1cc(NS(=O)(=O)c2ccc(Cl)cc2)ccc1Oc1cncc(Cl)c1 to produce O=C(O)c1cc(NS(=O)(=O)c2ccc(Cl)cc2)ccc1Oc1cncc(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.