Using CS(=O)(=O)Cl, Cc1nc(N)c2nc3n(c2c1C)CCCNC3 to produce Cc1nc(N)c2nc3n(c2c1C)CCCN(S(C)(=O)=O)C3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.