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Mekuete LBK, Tsopgni WDT, Nkojap AK, Kojom JJW, Stark TD, Fouokeng Y, Dongmo AB, Azeufack LT, Azebaze AGB. Rotenoids and Isoflavones from Xeroderris stuhlmannii (Taub.) Mendonça & E.P. Souza and Their Biological Activities. Molecules 2023; 28:molecules28062846. [PMID: 36985817 PMCID: PMC10059994 DOI: 10.3390/molecules28062846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/11/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
Abstract
The phytochemical study of the ethanolic extract of the leaf of Xeroderris stuhlmannii led to the isolation of five hitherto unreported compounds including two isoflavones (1-2), and three rotenoids (3-5), along with eight known isoflavonoid derivatives (6-13) and one pterocarpan derivative (14). The structures of the new compounds and those of the known ones were established by the spectroscopic (1D and 2D NMR) and spectrometric (HRESIMS) techniques as well as a comparison of their spectroscopic data with those reported in the literature. The leaf extract, fractions, and isolated compounds were tested for their antibacterial effects against nine bacterial strains. Compounds 3, 8, 11, and 12 showed a significant antibacterial effect, with a minimum inhibitory concentration (MIC) value of 62.5 µg/mL each, against Salmonella typhi, Staphylococcus aureus, Klessiella pneumonae, and Escherichia coli, respectively. In addition, the leaf extract, fractions, and isolated compounds were tested for their antifungal effects against four fungal strains. The hexane fraction showed a significant antifungal effect with an MIC value of 125 µg/mL against Candida parasilosis, whereas compounds 3, 8, and 12 showed significant antifungal activity with an MIC value of 62.5 µg/mL, each against Candida parasilosis, Candida albicans, and Candida krusei, respectively.
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Affiliation(s)
- Livie Blondèle Kenou Mekuete
- Research Unit of Environmental and Applied Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon
- Department of Chemistry, Faculty of Sciences, University of Douala, Douala 24157, Cameroon
| | - Willifred Dongmo Tékapi Tsopgni
- Department of Chemistry, Faculty of Sciences, University of Douala, Douala 24157, Cameroon
- Lehrstuhl für Lebensmittelchemie und Molekulare Sensorik, Technische Universität München, 85354 Freising, Germany
| | - Augustine Kuinze Nkojap
- Department of Animal Biology and Physiology, Faculty of Sciences, University of Douala, Douala 24517, Cameroon
| | - Jacquy Joyce Wanche Kojom
- Department of Animal Biology and Physiology, Faculty of Sciences, University of Douala, Douala 24517, Cameroon
| | - Timo D Stark
- Lehrstuhl für Lebensmittelchemie und Molekulare Sensorik, Technische Universität München, 85354 Freising, Germany
| | - Yannick Fouokeng
- Department of Chemistry, Faculty of Sciences, University of Douala, Douala 24157, Cameroon
| | - Alain Bertrand Dongmo
- Department of Animal Biology and Physiology, Faculty of Sciences, University of Douala, Douala 24517, Cameroon
| | - Léon Tapondjou Azeufack
- Research Unit of Environmental and Applied Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon
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