Using Cc1c(Oc2ccc(Cl)cc2)c2c([N+](=O)[O-])ccc(Br)c2n1CC(=O)OC(C)(C)C to produce Cc1c(Oc2ccc(Cl)cc2)c2c(N)cccc2n1CC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.