Two new glucosides 1 and 2 were isolated from a non-saponin fraction of a water extract of Red Ginseng (steamed ginseng root). The structurs of the glucosides was elucidated by MS and by 1H and 13C NMR spectrometry. Neither glucoside was detected in White Ginseng, being artifacts formed during the processing of Red Ginseng. Since 2, an unstable epimeric mixture, is readily decomposed to give maltol, this glucoside must be an intermediate in the formation of maltol from maltose during the steaming process.
从红参(
水煮人参根)的非
皂苷部分提取了两个新的
葡萄糖苷1和2。这些
葡萄糖苷的结构通过质谱和^1H及^13C核磁共振谱法被阐明。在白参中未检测到这两种
葡萄糖苷,它们是红参加工过程中形成的人工产物。由于2是一种不稳定的异构体混合物,容易分解生成
麦芽醇,因此这个
葡萄糖苷必须是在蒸煮过程中由
麦芽糖形成
麦芽醇的中间产物。