Using COC(=O)Cc1c[nH]c2c([N+](=O)[O-])cccc12, COC(=O)CBr to produce COC(=O)Cc1cn(CC(=O)OC)c2c([N+](=O)[O-])cccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.