Using O=C1CC=Cc2ccccc21, O=Cc1cccc([N+](=O)[O-])c1 to produce O=C1C(=Cc2cccc([N+](=O)[O-])c2)CCc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.