Using CCCC[Sn](Cl)(CCCC)CCCC, Clc1ccc(-n2cccn2)cc1 to produce CCCC[Sn](CCCC)(CCCC)c1ccnn1-c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.