参考文献

Manaev, Yu. A.; Khrapov, A. V.; Perevalov, V. P. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1991 , vol. 27, # 6 p. 656 - 658 Khimiya Geterotsiklicheskikh Soedinenii, 1991 , vol. 27, # 6 p. 833 - 835