Using C=C[Sn](CCCC)(CCCC)CCCC, Cc1nn(-c2c(Cl)cc(C(F)(F)F)cc2Cl)c(C)c1I to produce C=Cc1c(C)nn(-c2c(Cl)cc(C(F)(F)F)cc2Cl)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.