Phytochemical Constituents of Vangueria Infausta: Their Radical Scavenging and Antimicrobial Activities

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dc.contributor.authorMbukwa, Elbert A.
dc.contributor.authorChacha, Musa
dc.contributor.authorMajinda, Runner R. T.
dc.date.accessioned2016-06-15T20:55:00Z
dc.date.available2016-06-15T20:55:00Z
dc.date.issued2007-01
dc.description.abstractA new biflavonoid, 5,7,3',5'',7'',4'''-hexahydroxy (4'-O-3''')-biflavone (1) and a polyketide derivative, methylcylohex-1-ene (3) [previously reported only as a synthetic compound] were isolated from aerial parts of Vangueria infausta. In addition, eight other known flavonoids viz. (-)-epicatechin, epiafzelechin, dihydrokaempferol, quercetin, luteolin (2), dihydroquercetin-3'-O-glucoside, daidzein and genistein were also isolated from this plant. Structures were identified using 1D-and 2D NMR experiments as well as ESI-MS, IR and UV spectra. The new biflavonoid 1 showed higher radical scavenging activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) reagent compared to ascorbic acid (standard) using a spectrophotometric method. Compound 1 was less sensitive to Gram-positive and Gram-negative bacterial strains and yeast (Candida mycoderma) compared to luteolin and quercetin on the Bioautographic Agar Overlay Assay.en_US
dc.identifier.citationMbukwa, E., Chacha, M. and Majinda, R.R., 2007. Phytochemical constituents of Vangueria infausta: their radical scavenging and antimicrobial activities. Arkivoc, 9, pp.104-112.en_US
dc.identifier.doi10.3998/ark.5550190.0008.912
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2495
dc.language.isoenen_US
dc.subjectVangueria infaustaen_US
dc.subjectFlavonoidsen_US
dc.subjectPolyketide derivativeen_US
dc.subjectDPPHen_US
dc.subjectAntibacterialen_US
dc.subjectAntifungalen_US
dc.titlePhytochemical Constituents of Vangueria Infausta: Their Radical Scavenging and Antimicrobial Activitiesen_US
dc.typeJournal Article, Peer Revieweden_US
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