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Piliostigmin, a 2-phenoxychromone, and C-methylflavonols from Piliostigma thonningii
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Medicinal Chemistry, Division of Pharmacognosy.
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1996 (English)In: Phytochemistry, ISSN 0031-9422, E-ISSN 1873-3700, Vol. 43, no 3, 687-690 p.Article in journal (Refereed) Published
Abstract [en]

Piliostigmin, a 2-phenoxychromone, and three C-methylflavonols, 6,8-di-C-methylquercetin 3-methyl ether, 6-C-methylquercetin 3,7-dimethyl ether and 6,8-di-C-methylquercetin 3,7-dimethyl ether, were isolated from the leaves of Piliostigma thonningii, together with the known compounds quercetin, quercitrin, 6-C-methylquercetin S-methyl ether, 6-C-methylquercetin 3,7,3'-trimethyl ether, 6,8-di-C-methyllraempferol 3-methyl ether and 6,8-di-C-methyllraempferol 3,7-dimethyl ether. The structures of the new compounds were established by spectral methods, especially 2D NMR. Complete C-13 assignments using HMBC experiments are reported for the four latter C-methylflavonols.

Place, publisher, year, edition, pages
1996. Vol. 43, no 3, 687-690 p.
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Pharmaceutical Sciences Natural Sciences
URN: urn:nbn:se:uu:diva-50656DOI: 10.1016/0031-9422(96)00367-6ISI: A1996VK00300028OAI: oai:DiVA.org:uu-50656DiVA: diva2:78564
Available from: 2008-10-17 Created: 2008-10-17 Last updated: 2010-10-19Bibliographically approved

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