Using CCCC[Sn](Cl)(CCCC)CCCC, Cn1nc(I)c2c1CCCC2 to produce CCCC[Sn](CCCC)(CCCC)c1nn(C)c2c1CCCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.