Using OO, CSCCN1C(=O)CN=C(c2ccccc2)c2cc(Cl)ccc21 to produce CS(=O)CCN1C(=O)CN=C(c2ccccc2)c2cc(Cl)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.