Using Fc1cccc(Cl)c1-c1c(Cl)cc(Cl)nc1Cl, CCCC[Sn](CCCC)(CCCC)c1ncccn1 to produce Fc1cccc(Cl)c1-c1c(Cl)cc(-c2ncccn2)nc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.