Using O=Cc1c[nH]c2ncccc12, COC(=O)CCC[N+](=O)[O-] to produce COC(=O)CCC(=Cc1c[nH]c2ncccc12)[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.