Using O=C([O-])CS(=O)(=O)c1ccc2c(-c3ccc(Cl)cc3)noc2c1 to produce O=C(O)CS(=O)(=O)c1ccc2c(-c3ccc(Cl)cc3)noc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.