Using O=Cc1c2n(c3ccc(Cl)cc13)CCC2, CC[N+](=O)[O-] to produce CC(=Cc1c2n(c3ccc(Cl)cc13)CCC2)[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.