参考文献

Gracheva, I. N.; Tochilkin, A. I. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1988 , vol. 24, p. 65 - 67 Khimiya Geterotsiklicheskikh Soedinenii, 1988 , vol. 24, # 1 p. 77 - 79