参考文献

Trofimov,F.A. et al. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1975 , vol. 11, p. 1129 - 1131 Khimiya Geterotsiklicheskikh Soedinenii, 1975 , vol. 11, # 10 p. 1319 - 1321