Chem. Pharm. Bull.

Chem. Pharm. Bull., 53(9),1122-1125, September 2005

Regular Articles

Three Unusual 22-β-O-23-Hydroxy-(5α)-spirostanol Glycosides from the Fruits of Solanum torvum

Yoshihiko IIDA,^a Yoshihiro YANAI,^a Masateru ONO,^b Tsuyoshi IKEDA,^a and Toshihiro NOHARA^*^,a

^a Faculty of Medical and Pharmaceutical Sciences, Kumamoto University; 5-1 Oe-honmachi, Kumamoto 862-0973, Japan: and ^b School of Agriculture, Kyushu Tokai University; 5435 Choyo, Aso, Kumamoto 869-1404, Japan. * To whom correspondence should be addressed. e-mail: none@gpo.kumamoto-u.ac.jp

Three novel 22-β-O-spirostanol oligoglycosides, torvosides J (1), K (2) and L (3) have been isolated from the fruits of Solanum torvum SWARTZ and their chemical structures have been characterized based on the spectroscopic means. They are worth of note as rare 22-β-O-spirostanol glycosides.

Key words Solanum torvum; steroid glycoside; 22-β-O-spirostanol; Thai cuisine

Regular Articles

Three Unusual 22-β-O-23-Hydroxy-(5α)-spirostanol Glycosides from the Fruits of Solanum torvum

Yoshihiko IIDA,a Yoshihiro YANAI,a Masateru ONO,b Tsuyoshi IKEDA,a and Toshihiro NOHARA*,a

a Faculty of Medical and Pharmaceutical Sciences, Kumamoto University; 5-1 Oe-honmachi, Kumamoto 862-0973, Japan: and b School of Agriculture, Kyushu Tokai University; 5435 Choyo, Aso, Kumamoto 869-1404, Japan. * To whom correspondence should be addressed. e-mail: none@gpo.kumamoto-u.ac.jp

Yoshihiko IIDA,^a Yoshihiro YANAI,^a Masateru ONO,^b Tsuyoshi IKEDA,^a and Toshihiro NOHARA^*^,a

^a Faculty of Medical and Pharmaceutical Sciences, Kumamoto University; 5-1 Oe-honmachi, Kumamoto 862-0973, Japan: and ^b School of Agriculture, Kyushu Tokai University; 5435 Choyo, Aso, Kumamoto 869-1404, Japan. * To whom correspondence should be addressed. e-mail: none@gpo.kumamoto-u.ac.jp