参考文献
Gordeeva, G. N.; Kalashnikov, S. M.; Popov, Yu. N.; Kruglov, E. A.; Imashev, U. B.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 6 p. 638 - 641
Khimiya Geterotsiklicheskikh Soedinenii, 1987 , vol. 23, # 6 p. 772 - 775