Using CCCC[Sn](Cl)(CCCC)CCCC, CCSc1ncc2cccc(C)n12 to produce CCCC[Sn](CCCC)(CCCC)c1cccc2cnc(SCC)n12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.