参考文献
Blokhina, A. V.; Boronin, V. G.; Druzhinina, V. V.; Zhestkov, V. P.; Portnov, Yu. N.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 4 p. 395 - 399
Khimiya Geterotsiklicheskikh Soedinenii, 1987 , # 4 p. 474 - 478