参考文献
Tolmachev, A. A.; Tolmacheva, V. S.; Shevchuk, L. I.; Kozlov, E. S.; Babichev, F. S.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1989 , vol. 25, # 7 p. 764 - 767
Khimiya Geterotsiklicheskikh Soedinenii, 1989 , # 7 p. 919 - 923
