Using O=C(Cl)c1c(C(F)(F)F)cc(Cl)nc1Cl, C=C(Cl)Cl to produce O=C(C=C(Cl)Cl)c1c(C(F)(F)F)cc(Cl)nc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.