Using COC(=O)c1ccc(SC(CCc2ccc(Cl)cc2)Cn2ccnc2)cc1 to produce O=C([O-])c1ccc(SC(CCc2ccc(Cl)cc2)Cn2ccnc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.