Using CCCC[Sn](CCCC)(CCCC)c1ccco1, Clc1nc(Cl)c2ccnc-2[nH]1 to produce Clc1nc(-c2ccco2)c2ccnc-2[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.