Rønsted Nina, Bello Maria Angelica, Jensen Søren Rosendal
Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3DS, UK.
Phytochemistry. 2003 Sep;64(2):529-33. doi: 10.1016/s0031-9422(03)00157-2.
From the water-soluble part of an extract of Aragoa cundinamarcensis were isolated seven iridoid glucosides, namely aucubin, catalpol, rehmannioside D, globularin, gardoside methyl ester, epiloganin and mussaenoside. The main glycoside isolated, however, was a new caffeoyl phenylethanoid triglycoside, named aragoside, containing two beta-gluco- and one alpha-arabinopyranosyl moieties which constituted almost 5% of the dry weight of the plant. Finally, sorbitol was found to be the main carbohydrate constituent of the plant. This distinctive combination of compounds is very similar to that reported from some species of Plantago. The present findings therefore support the results from a recently published molecular phylogenetic study of plastid and nuclear ribosomal DNA sequences, where Aragoa was found to be the closest relative to Plantago so far discovered.
从昆迪纳马卡阿腊戈阿(Aragoa cundinamarcensis)提取物的水溶性部分分离出七种环烯醚萜苷,即桃叶珊瑚苷、梓醇、地黄苷D、球花苷、栀子苷甲酯、表告伊春和莫桑苷。然而,分离出的主要苷是一种新的咖啡酰苯乙醇三糖苷,命名为阿腊戈苷,含有两个β-葡萄糖和一个α-阿拉伯吡喃糖基部分,占植物干重的近5%。最后,发现山梨醇是该植物的主要碳水化合物成分。这种独特的化合物组合与一些车前草属植物报道的非常相似。因此,目前的研究结果支持了最近发表的一项关于质体和核糖体DNA序列的分子系统发育研究的结果,该研究发现阿腊戈阿是迄今为止发现的与车前草关系最密切的亲属。