Using O=C(OCc1ccccc1)c1ccc(CBr)c([N+](=O)[O-])c1, COC(=O)/C=C/c1cc(C)c(C=O)c(C)c1 to produce COC(=O)/C=C/c1cc(C)c(/C=C/c2ccc(C(=O)OCc3ccccc3)cc2[N+](=O)[O-])c(C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.