Using CC1(C)CC(Nc2nccc(-c3ccc(Br)s3)n2)CC(C)(C)N1, C[Sn](C)(C)c1ccncc1 to produce CC1(C)CC(Nc2nccc(-c3ccc(-c4ccncc4)s3)n2)CC(C)(C)N1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.