Using O=c1[nH]c2ccccc2c(=O)n1-c1ccc([N+](=O)[O-])cc1Br to produce Nc1ccc(-n2c(=O)[nH]c3ccccc3c2=O)c(Br)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.