Flavonols and an indole alkaloid skeleton bearing identical acylated glycosidic groups from yellow petals of Papaver nudicaule |
| |
Authors: | Schliemann Willibald Schneider Bernd Wray Victor Schmidt Jürgen Nimtz Manfred Porzel Andrea Böhm Hartmut |
| |
Institution: | Department of Secondary Metabolism, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany. willibald.schliemann@ipb-halle.de |
| |
Abstract: | From yellow petals of Iceland poppy, besides the known flavonoid gossypitrin, seven kaempferol derivatives were isolated. In addition to kaempferol 3-O-beta-sophoroside and kaempferol 3-O-beta-sophoroside-7-O-beta-glucoside, known from other plants, the mono- and dimalonyl conjugates of the latter were identified by MS and NMR spectroscopy. Structure analyses of a set of co-occurring pigments, the nudicaulins, revealed that they have the identical acylated glycoside moieties attached to a pentacyclic indole alkaloid skeleton for which the structure of 19-(4-hydroxyphenyl)-10H-1,10-ethenochromeno2,3-b]indole-6,8,18-triol was deduced from MS and NMR as well as chemical and chiroptical methods. |
| |
Keywords: | Papaver nudicaule Papaveraceae Iceland poppy Flower pigments Kaempferol glycosides Malonyl conjugates Nudicaulins |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|