Using [S-2], CCCCNc1c(C(=O)OCC)c(C)nc(Cl)c1[N+](=O)[O-] to produce CCCCNc1c(C(=O)OCC)c(C)nc(S)c1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.