Using O=S(=O)(Cl)c1nnc(-c2ccc(Cl)cc2)s1, CCOC(=O)CNCCN to produce CCOC(=O)CNCCNS(=O)(=O)c1nnc(-c2ccc(Cl)cc2)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.