New Dimeric Flavans from Gambir, an Extract of Uncaria gambir
نویسندگان
چکیده
منابع مشابه
[Evaluation of gambir quality based on quantitative analysis of polyphenolic constituents].
Gambir (asen'yaku in Japanese), an aqueous extract of leaves and young twigs of Uncaria gambir Roxb., has traditionally been used as a treatment for diarrhea and dysentery as an internal medicine and for sore throat as a gargle. Although it is a pharmacopoeic medicine in Japan, the quantitative evaluation of its constituents has not yet been adopted in the Japanese pharmacopoeia. We analyzed po...
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BACKGROUND Betel quid chewing is a popular habit in Southeast Asia. It is believed that chewing betel quid could reduce stress, strengthen teeth and maintain oral hygiene. The aim of this study was to investigate the antioxidant and cytoprotective activities of each of the ingredients of betel quid and compared with betel quid itself (with and without calcium hydroxide). The correlation of thei...
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Endophytic fungi are specific microbes that live at a specific ecosystem in nature. Various endophytic fungi have been known posses an ability to produce a broad range of biologically active substances. Totally 53 endophytic filamentous fungi were isolated from leaves, stems, fruits and roots of the two plant varieties of Uncaria gambier Roxb. (Rubiaceae), i.e. gambir udang and gambir nasi. Mor...
متن کاملRauniticine-allo-oxindole B and rauniticinic-allo acid B, new heteroyohimbine-type oxindole alkaloids from the stems of Malaysian Uncaria longiflora var. pteropoda.
Two new heteroyohimbine-type oxindole alkaloids, rauniticine-allo-oxindole B and rauniticinic-allo acid B, have been successfully isolated from the stems extract of Malaysian Uncaria longiflora var. pteropoda. The structures of the two new alkaloids were determined by spectroscopic analysis.
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ژورنال
عنوان ژورنال: HETEROCYCLES
سال: 2007
ISSN: 0385-5414
DOI: 10.3987/com-07-s(w)37