Using CCCC[Sn](Cl)(CCCC)CCCC, c1cncc(-c2nccs2)c1 to produce CCCC[Sn](CCCC)(CCCC)c1cnc(-c2cccnc2)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.