Using CCCC[Sn](CCCC)(CCCC)c1ccccn1, Clc1ccc2c(cc(Br)n2Cc2ccccc2)n1 to produce Clc1ccc2c(cc(-c3ccccn3)n2Cc2ccccc2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.