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A New Ceramide (Rumexamide) and Other Chemical Constituents from <i>Rumex abyssinicus</i>Jacq (Polygonaceae): Isolation, Characterization, Antibacterial Activities and chemophenetic significance

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Advances in Biological Chemistry 2021年第5期11卷 266-282页

作者： Léonel Donald Feugap Tsamo Lorette Victorine Yimgang Steven Collins N. Wouamba Pierre Mkounga Augustin Ephrem Nkengfack Laurence Voutquenne-Nazabadioko David Ngnokam Bruno Ndjakou Lenta Norbert Sewald Research Unit of Applied and Environmental Chemistry Department of Chemistry Faculty of Science University of Dschang Dschang Cameroon Department of Organic Chemistry Faculty of Science University of Yaoundé I Yaoundé Cameroon Antimicrobial Agents Unit Laboratory for Phytobiochemistry and Medicinal Plants Studies University of Yaoundé I Yaoundé Cameroon Department of Chemistry Higher Teacher Training College University of Yaounde I Yaoundé Cameroon Groupe Isolement et Structure Institut de Chimie Moléculaire de Reims (ICMR) Reims France Organic and Bioorganic Chemistry Faculty of Chemistry Bielefeld University Bielefeld Germany

The chemical study of Rumex abyssinicus Jacp (Polygonaceae) led to the isolation of a new ceramide named (R)-2'-hydroxy-N-[(2S,3S,4R,16E)-1,3,4-trihydroxyhexacos-16-en-2-yl]hexadecanamide (rumexamide) (1) together with sixteen known compounds: bis-(2-ethylhexyl) phthalate (2), chrysophanol (3), physcion (4), citreorosein (5), emodin (6), chrysophanein (7), physcionin (8), lupeol (9), 3β,28-dihydroxylup-20(29)-ene (10), 3β-dihydroxylup-20(29)-en-28-oic acid (11), oleanolic acid (12), ergosta-6,22-diene-3,5,8-triol (13), stigmastane-3,6-dione (14), a mixture of β-sitosterol (15) and stigmasterol (16), and stigmasterol 3-O-β-D-glucoside (17). Their structures were determined by interpretation of their spectroscopic 1D NMR (1H and 13C NMR), 2D NMR (COSY 1H-1H, HSQC and HMBC) data in conjunction with mass spectrometry (TOFESIMS and HR-TOFESIMS) and by comparison with those reported in the literature. Among all the known compounds, twelve (2, 5, 8-17) were firstly isolated from Rumex abyssinicus, seven (2, 10-14 and 17) from the genus Rumex and three (13, 14, 17) from family Polygonaceae. The in vitro antibacterial activities of extracts (MeOH, n-BuOH and EtOAc), as well as compounds 9,

关键词： Polygonaceae Rumex abyssinicus Rumexamide Antibacterial Activities chemophenetic significance

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Ethnobotany, Pharmacology and Phytochemical Investigations of the Seeds of <i>Pentaclethra macrophylla</i>Benth (Mimosaceae)

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Advances in Biological Chemistry 2021年第3期11卷 126-141页

作者： Pierre V. K. Sinda Beaudelaire K. Ponou Borice T. Tsafack Jonas Kühlborn Roland T. Tchuenguem Rémy B. Teponno Jean P. Dzoyem Till Opatz Léon A. Tapondjou Research Unit of Environmental and Applied Chemistry Department of Chemistry Faculty of Science University of Dschang Dschang Cameroon Department of Chemistry Johannes Gutenberg University Duesbergweg Mainz Germany Research Unit of Microbiology and Antimicrobial Substances Department of Biochemistry Faculty of Science University of Dschang Dschang Cameroon

Phytochemical investigation of the seeds of Pentaclethra macrophylla led to the isolation of a mixture of two new aromatic monoterpene glycosides, pentamacrophylloside A (1a) and pentamacrophylloside B (1b), together with six known secondary metabolites: Comososide (2), secopentaclethroside (3), caffeoylputrescine (4), β-sitosterol-3-O-β-D-glucopyranoside (5), 2-hydroxymethyl-5-(2-hydroxypropan

关键词： Pentaclethra macrophylla Ethnobotany Pharmacology Aromatic Monoterpenoids chemophenetic significance Antimicrobial Activity

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