Rasulova, Kh. A.; Bessonova, I. A.; Yagudaev, M. R.; Yunusov, S. Yu. Chemistry of Natural Compounds, 1988 , vol. 24, # 1 p. 82 - 84 Khimiya Prirodnykh Soedinenii, 1988 , vol. 24, # 1 p. 94 - 97