Using Nc1nc(Cl)c2[nH]nnc2n1, CCCC[Sn](CCCC)(CCCC)c1ccco1 to produce Nc1nc(-c2ccco2)c2[nH]nnc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.