1992 年 40 巻 5 号 p. 1199-1202
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.