参考文献

Valter, R. E.; Kampare, R. B.; Valtere, S. P.; Balode, D. E.; Batse, A. E. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1983 , vol. 19, # 12 p. 1290 - 1292 Khimiya Geterotsiklicheskikh Soedinenii, 1983 , vol. 19, # 12 p. 1635 - 1637