Using O=c1[nH]nc2n1-c1ccc(Cl)cc1C(c1ccccc1F)CC2 to produce O=c1[nH]nc2n1-c1ccc(Cl)cc1C(c1ccccc1F)=CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.