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Communication | Special issue | Vol 49, No. 1, 1998, pp.93-96
Published online, 1st January, 1970
DOI: 10.3987/COM-98-S41
Absolute Stereostructures of Spinacosides C and D with a Novel Acetal Type Substituent from Spinacia oleracea (Spinach) and Basella rubra (Indian Spinach)

Masayuki Yoshikawa,* Toshiyuki Murakami, Kazuhiro Hirano, Hisashi Matsuda, Johji Yamahara, Kazuhiro Ohtani, Ryoji Kasai, and Kazuo Yamasaki

*Kyoto Pharmaceutical University, 5 Nakauchi-cho, Misasagi, Yamashina-ku, Kyoto 607-8414, Japan

Abstract

Spinacosides C and D with a novel acetal-type substituent were isolated from the fresh aerial parts of Spinacia oleracea (Spinach) and Basella rubra (Indian spinach). Their absolute stereostructures were determined on the basis of physicochemical and chemical evidence, which included the conversion from the α-L-arabinopyranosyl moiety of a known saponin momordin I to the acetal-type substituent of spinacoside D.