Using COC(=O)c1c(CSc2cccc(OC)c2)cccc1[N+](=O)[O-] to produce COc1cccc(SCc2cccc([N+](=O)[O-])c2C(=O)O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.