Using CCCC[Sn](CCCC)(CCCC)c1cccs1, Cc1nc(Cl)cc2c1C(=O)OCC2 to produce Cc1nc(-c2cccs2)cc2c1C(=O)OCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.