Using Cc1c(Br)c[nH]c(=O)c1[N+](=O)[O-], COc1ccc(CCl)cc1 to produce COc1ccc(Cn2cc(Br)c(C)c([N+](=O)[O-])c2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.