Using COCOc1c(OC)cc(C(S)CS)cc1OC, CCCOc1c(OC)cc(C=O)cc1[N+](=O)[O-] to produce CCCOc1c(OC)cc([C@@H]2SC[C@@H](c3cc(OC)c(OC)c(OC)c3)S2)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.