Using CCOC(=O)c1c(-c2ccc([N+](=O)[O-])cc2)c2c(N)ncnn2c1Br to produce CCOC(=O)c1c(-c2ccc(N)cc2)c2c(N)ncnn2c1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.