Using CNc1cc(CC2(C)CC3C(=C(C)C(C)=C([N+](=O)[O-])C3C)O2)ccc1-c1ccn[nH]1 to produce CNc1cc(CC2(C)CC3C(=C(C)C(C)=C(N)C3C)O2)ccc1-c1ccn[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.