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Planta Med 1971; 20(6): 324-327
DOI: 10.1055/s-0028-1099711
© Georg Thieme Verlag Stuttgart · New York

SEPARATION OF A CARDIAC GLYCOSIDE FROM PENSTEMON GRANDIFLORUS

D. J. Chang, S. K. Wahba Khalil, Leo J. Schermeister
  • North Dakota State University, College of Pharmacy, Fargo, North Dakota 58102, USA
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Publication Date:
15 January 2009 (online)

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Abstract

A paper Chromatographie study of the different plant parts of Penstemon grandiflorus revealed the presence of three glycosides. This was confirmed by chemical means. Isolation of a crystalline glycoside was achieved on a partition silica gel column using 0.5 % methanol in ethyl acetate saturated with water as a developer. Physico–chemical analysis showed that the isolated glycoside has an unsaturated butadienolide lactone ring, a steroid nucleus and a sugar portion of glucose and digitoxose. The melting point, ultraviolet and infrared spectra were recorded.

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