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| http://dx.doi.org/10.1128/jb.93.1.497-498.1967 | DOI Listing |
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Chemical constituents and antibacterial activities of Cameroonian dark brown propolis against potential biofilm-forming bacteria.
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Department of General, Organic and Biomedical Chemistry, Faculty of Medicine and Pharmacy, University of Mons, NMR and Molecular Imaging Laboratory, Mons, Belgium.
Propolis is a resinous material collected by different bee species from various plant exudates and used to seal holes in honeycombs, smoothen the internal walls, embalm intruders, improve health and prevent diseases. From its -hexane extract, eight compounds were isolated and characterised as: mangiferonic acid (); 1-hydroxymangiferonic acid (), new natural product; mangiferolic acid(); 27-hydroxymangiferolic acid (), reported here for the first time as propolis constituent; 27-hydroxymangiferonic acid (); -amyrin (); -amyrin () and lupeol (). The chemical structures of the isolated compounds were elucidated using spectroscopic methods, such as 1D and 2D-NMR, mass spectrometry and comparison with previous published reports.
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PG & Research Department of Physics, Government Arts College for Men, Tamil Nadu, Krishnagiri, 635001, India.
Context: Schiff bases, which have intriguing properties in many areas, have been studied extensively in recent years due to their structural properties and biological activities. In this research, a novel water-soluble Schiff base complex, Catena-((μ-(E)-2-((4-methoxy-2-oxidobenzylidene) ammonio) ethane-1-sulfonato potassium, CHKNOS (CMOAESP), was synthesized by a one-step condensation reaction of 2-hydroxy-4-methoxy benzaldehyde and taurine with the yield of 65%, 0.333 g.
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