Using CCOC(=O)C(=O)NS(=O)(=O)Cc1nc(-c2ccc(Cl)c(Cl)c2)cs1 to produce O=C1NS(=O)(=O)C(c2nc(-c3ccc(Cl)c(Cl)c3)cs2)=C1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.