Using Cc1c(Cc2cccc([N+](=O)[O-])c2F)c(=O)oc2cc(OC(=O)N(C)C)ccc12, O=C1CCC(=O)N1Br to produce CN(C)C(=O)Oc1ccc2c(CBr)c(Cc3cccc([N+](=O)[O-])c3F)c(=O)oc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.