1. S.B. Mahato, A.N. Ganguly and N.P. Sahu, Steroid saponins, Phytochemistry 21: 959 (1982).
2. T. Nohara, Analysis of steroid sapogenins, in: Analysis of Sterols and Other Biologically Significant Steroids, W.D. Nes and E.J. Parish, Eds., Academic Press, San Diego (1989).
3. J.G. Roddick, Antifungal activity of plant steroids, in: Ecology and Metabolism of Plant Lipids, G. Fuller and W.D. Nes, Eds., American Chemical Society, Washington, DC (1987).
4. S. Grünweller, E. Schröder and J. Kesselmeier, Biological activities of furostanol saponins from Nicotiana tabacum, Phytochemistry 29: 2485 (1990).
5. T. Kawasaki, Spirostanol and furostanol type, in: Natural Products for Medicinal Use, S. Shibata, Ed., Nanzando Co., Tokyo (1982).