Using C=CCSC1C(CC)C(=O)N1CC(=O)O, O=[N+]([O-])c1ccc(CBr)cc1 to produce C=CCSC1C(CC)C(=O)N1CC(=O)OCc1ccc([N+](=O)[O-])cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.