オキシアントラヒノン含有植物中のオキシアントロンについて (第8報)

カスカラ皮の成分

抄録

Microchemical detection and determination of hydroxyanthraquinone and hydroxyanthrone derivatives were made by paper chromatography using the fresh and stored products of Cascara barks. It was thereby found that these components varied in accordance with the passage of time since collection. In the fresh bark, the presence of a minute amount of free emodin and small amounts of glycosides of chrysophanol, emodin, and aloe-emodin are detected while in the stored product, marked presence of the free and glycosides of emodin and aloe-emodin, and a small amount of chrysophanol were found. The presence of hydroxyanthrone derivatives in the fresh product was found only in a minute quantity in the stored goods. Drying of the fresh product with application of heat failed to show much change except that the presence of an unknown substance A became marked. Rhein and rhein-anthrone were not detected but some observations were made on four kinds of unknown substances. Anthrones of chrysophanol, emodin and aloe-emodine were isolated and identified, and were confirmed to be the 1, 8-dihydroxy-9-anthrone derivatives.