Chemotaxonomy of Plantag1.doc

Chemotaxonomy of Plantago. Iridoid glucosides and ca.eoylphenylethanoid glycosidesAbstractData for 34 species of Plantago (Plantaginaceae), including subgen. Littorella (=Littorella uniora), have been collected withregard to their content of iridoid glucosides and ca.eoyl phenylethanoid glycosides (CPGs). In the present work, 21 species wereinvestigated for the first time and many known compounds were found together with three new iridoid glucosides. Of these,arborescoside and arborescosidic acid, both of the uncommon type with an 8,9-double bond, were present in several species, while6-deoxymelittoside was found only in P. subulata. The known compounds deoxyloganic acid, caryoptoside and rehmannioside Dwere isolated from the genus for the first time. The earlier reported occurrence of sorbitol in the family was confirmed, and thiscompound was shown by NMR spectroscopy to be the main sugar in the three species investigated for this. The combined datashow that CPGs are present in all species investigated. With regard to the iridoids, the distribution patterns showed a goodcorrelation with the classification of Rahn. Thus, aucubin is typical for the whole genus, while bartsioside and catalpol as well as5-substituted iridoids are each characteristic for a subgenus in the family. Finally, the close relationship between Plantago andVeronica suggested by chloroplast DNA sequence analysis, could be corroborated by the common occurrence of the rare8,9-unsaturated iridoids in these two genera. # 2000 Elsevier Science Ltd. All rights reserved.Keywords: Plantago; Plantaginaceae; Chemotaxonomy; Iridoid glucosides; Bartsioside; Aucubin; Catalpol; Arborescoside; Arborescosidic Acid; 6-Deoxymelittoside; Verbascoside; Sorbitol车前草属的化学分类-环烯醚萜苷和咖啡酰苯乙醇苷 摘要车前草属的数据种类有34种（车前科），包括亚属。水车前亚属（=水车前亚属单向邑），已收集了 对于他们的环烯醚萜苷和咖啡酰（CPG集团）苯乙醇苷含量。在目前的工作中，有21种第一次调查，许多已知化合物和三个新的环烯醚萜苷一起被发现。其中， 水车前亚属和arborescosidic酸，这两种罕见的酸都有 8,9 -双键罕，目前存在于几个物种，而 6 deoxymelittoside只有在尖叶福禄考中被发现。已知化合物脱氧麦根酸，caryoptoside和地黄甙 被分离尚属首次。在这个科中较早的山梨醇被发现的报道得到证实，调查中,核磁共振光谱表明这种化合物在这3种酸中是主要的糖. 合并后的数据显示CPG在所有的种中都存在，目前正在所有的物种中进行调查。关于苷类成分，分布的格局和拉恩分类呈现出良好的相关性. 因此，桃叶珊瑚甙是整个属中典型的化合物，而bartsioside和梓醇以及5取代苷类成分是每个属中的一个亚属的特征。最后，车前属和婆婆纳属之间的密切关系由叶绿体DNA序列分析表明，可以被在这两个属中共同发生的罕见8,9 -不饱键苷类佐证#20