Using CCOC(=O)C(F)=C(C)C1(C(=O)OCC)CC1, O=C1CCC(=O)N1Br to produce CCOC(=O)/C(F)=C(\CBr)C1(C(=O)OCC)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.