参考文献

Glotova, T. E.; Nakhmanovich, A. S.; Sigalov, M. V. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1989 , vol. 25, # l p. 568 - 571 Khimiya Geterotsiklicheskikh Soedinenii, 1989 , # 5 p. 680 - 682