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Diprenylated Indole Alkaloids from Fruits of Hexalobus monopetalus |
Hamisi M. Malebo1, Stephan A. Jonker2, Reiner Waibel3, Mayunga H. H. Nkunya2 |
1. Department of Traditional Medicine Research, National Institute for Medical Research, P. O. Box 9653, Dar es Salaam, Tanzania; 2. Department of Chemistry, University of Dar es Salaam, P. O. Box 35061, Dar es Salaam, Tanzania; 3. Department of Pharmaceutical Chemistry, Institute of Pharmacy, University of Erlangen, Schuhstrasse 19, 91052 Erlangen, Germany |
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Abstract New hexalobine type alkaloid, 5-(2", 3"-epoxy-3"-methylbutyl)-3-(3'-hydroxy-3'-methyl-1'-acetyloxy-but-2'-yl) indole(1) alongside the known hexalobines 3-(2', 3'-dihydroxy-3'-methylbutyl)-5-(3"-methylcrotonoyl) indole(2), 3, 5-hexalobine C(3) and 3, 5-hexalobine D(4) were isolated from fruits of Hexalobus monopetalus. Compounds 3 and 4 exhibited antifungal activity against Candida albicans.
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Keywords
Hexalobus monopetalus
Hexalobines
Indole alkaloids
Candida albicans
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Fund:The Norwegian Agency for International Development(NORAD) through the NORAD Chemistry Project is appreciated for supporting this work through a scholarship grant to H. M. M. The National Institute for Medical Research(NIMR), The Department of Chemistry at the University of Dar es Salaam in Tanzania and the Department of Pharmaceutical Chemistry in the Institute of Pharmacy at Erlangen University in Germany are thanked for supporting the research project. |
Issue Date: 11 February 2018
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1. B. Verdcourt, Flora of Tropical East Africa-Annonaceae (Crown Agents, London, 1971) 2. F.R. Irvine, Wood plants of Ghana (Oxford University Press, London, 1961), p. 9 3. C.C. Joseph, M.Sc, thesis, University of Dar es Salaam, Tanzania, 1993 4. H. Achenbach, C. Renner, R. Waibel, Liebigs Annalen, 1327, 1995 5. M. Lowel, Ph.D. thesis, University of Erlangen, Federal Republic of Germany, 1992 6. C. Renner, Ph.D. thesis, University of Erlangen, Federal Republic of Germany, 1986 7. H. Achenbach, M. Lowel, Phytochemistry 40, 967 (1995) 8. D.H. Williams, I. Fleming, Spectroscopic Methods in Organic Chemistry, 4th edn. (McGraw-Hill Book Company, New Delhi, 1989) |
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