Using Clc1cnc(Cl)c(Br)c1, C=Cc1ccc(OC)c(F)c1C=O to produce C=Cc1ccc(OC)c(F)c1C(O)c1cc(Cl)cnc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.