7-Oxodihydrokarounidiol [7-Oxo-D : C-friedo-olean-8-ene-3α, 29-diol], a Novel Triterpene from Trichosanthes kirilowii

Toshihiro AKIHISA; Wilhelmus C. M. C. KOKKE; Toshitake TAMURA; Toshio NAMBARA

doi:10.1248/cpb.40.1199

Toshihiro AKIHISA, Wilhelmus C. M. C. KOKKE, Toshitake TAMURA, Toshio NAMBARA

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Keywords: Trichosanthes kirilowii, Cucurbitaceae, seed, triterpene, 7-oxodihydrokarounidiol, 7-oxo-D : C-friedo-olean-8-ene-3α, 29-diol, ^1H-NMR spectrum, ^<13>C-NMR spectrum

JOURNAL FREE ACCESS

1992 Volume 40 Issue 5 Pages 1199-1202

DOI https://doi.org/10.1248/cpb.40.1199

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Abstract

The structure of 7-oxodihydrokarounidiol [7-oxo-D : C-friedo-olean-8-ene-3α, 29-diol], isolated from the seeds of Trichosanthes kirilowii (Cucurbitaceae), was determined by chemical correlation with karounidiol [D : C-friedo-oleana-7, 9(11)-diene-3α, 29-diol] from the same source. Two other natural products, viz. bryonolic acid (3β-hydroxy-D : C-friedo-olean-8-en-29-oic acid) and bryononic acid (3-oxo-D : C-friedo-olean-8-en-29-oic acid), were also correlated with karounidiol.

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