Zapesochnaya, G. G.; Tyukavkina, N. A.; Shervashidze, I. V.
Chemistry of Natural Compounds, 1982 , vol. 18, # 2 p. 160 - 163
Khimiya Prirodnykh Soedinenii, 1982 , vol. 18, # 2 p. 176 - 180