Using CCCC[Sn](CCCC)(CCCC)c1ccccn1, Clc1ccc(-c2ccc(Cl)nn2)nn1 to produce c1ccc(-c2ccc(-c3ccc(-c4ccccn4)nn3)nn2)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.