Using [S-2], COC(=O)c1ccc(Cl)c([N+](=O)[O-])c1 to produce COC(=O)c1ccc(SSc2ccc(C(=O)OC)cc2[N+](=O)[O-])c([N+](=O)[O-])c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.