Abstract
Basic components in the heart wood of Michelia compressa MAXIM. (Japanese name “Ogatama-no-ki”) growing in Japan was examined and the presence of ushinsunine (I) and oxoushinsunine (II) was proved by their isolation. Ito had earlier isolated from the trunk bark of domestic Michelia compressa, the tertiary, phenolic biscoclaurine-type base oxyacanthine, the quaternary, berberine-type bases berberine, palmatine, and jatrorrhizine, and the aporphine-type bases magnoflorine and michepressine. Yang had isolated ushinsunine (I) and oxoushinsunine (liriodenine) (II) from the heart wood of Formosan Michelia compressa MAXIM. var. Formosana KANEHIRA (Japanese name “Taiwan-Ogatama-no-ki”).
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