Using O=[N+]([O-])O, CN(C)CCCN1c2ccccc2CCc2ccccc21 to produce CN(C)CCCN1c2ccccc2CCc2cc([N+](=O)[O-])ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.