Using [N-]=[N+]=[N-], CN1CC2C3C=CC(C3)C2(c2ccc(N)cc2)C1 to produce CN1CC2C3CCC(C3)C2(c2ccc(N=[N+]=[N-])cc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.