Using O=Cc1cccc([N+](=O)[O-])c1, CC12CCC(CC1=O)C2(C)C to produce CC12CCC(C(=Cc3cccc([N+](=O)[O-])c3)C1=O)C2(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.