Using C#CCNC(=O)C(F)(F)F, O=[N+]([O-])c1cccc(Br)c1 to produce O=C(NCC#Cc1cccc([N+](=O)[O-])c1)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.