Using Fc1cc(F)c2c(I)n[nH]c2c1, CCCC[Sn](Cl)(CCCC)CCCC to produce CCCC[Sn](CCCC)(CCCC)c1n[nH]c2cc(F)cc(F)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.