Using COC(=O)C1=C(C)NC2=C(C(=O)CC2)C1c1ccc(F)c(Br)c1 to produce CC1=C(C(=O)O)C(c2ccc(F)c(Br)c2)C2=C(CCC2=O)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.