Using CCCC[Sn](CCCC)(CCCC)c1ccccn1, Cc1nnc(-c2ccc3occ(Br)c3c2)o1 to produce Cc1nnc(-c2ccc3occ(-c4ccccn4)c3c2)o1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.