A new tetranortriterpene, mzikonone (12α-acetoxy-1,2-dihydro-7-deacetylazadirone), has been isolated as the major limonoid from the root bark of Turraea robusta and its structure determined by spectroscopic and chemical methods. Its degree of oxidation is much lower than that of limonoids previously reported from two other Turraea species and this suggests that care must be taken in using the prieurianin and closely related limonoids as taxonomic markers for this genus.

Journal Article Biocidal Alkaloids from African Fagara Plants: Inhibition of Mitochondrial Function Get access Makoto Taniguchi, Makoto Taniguchi Faculty of Science, Osaka City University, Sumiyoshi-ku, Osaka 558, Japan Search for other works by this author on: Oxford Academic Google Scholar Hiroyuki Haraguchi, Hiroyuki Haraguchi Faculty of Science, Osaka City University, Sumiyoshi-ku, Osaka 558, Japan Search for other works by this author on: Oxford Academic Google Scholar Fujito Higuchi, Fujito Higuchi Faculty of Science, Osaka City University, Sumiyoshi-ku, Osaka 558, Japan Search for other works by this author on: Oxford Academic Google Scholar Susumu Oi, Susumu Oi Faculty of Science, Osaka City University, Sumiyoshi-ku, Osaka 558, Japan Search for other works by this author on: Oxford Academic Google Scholar Andrew Chapya, Andrew Chapya International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya Search for other works by this author on: Oxford Academic Google Scholar Isao Kubo Isao Kubo Division of Entomology and Parasitology, College of Natural Resources, University of California, Berkeley, California 94720, U.S.A. Search for other works by this author on: Oxford Academic Google Scholar Agricultural and Biological Chemistry, Volume 49, Issue 10, 1 October 1985, Pages 3051–3052, https://doi.org/10.1080/00021369.1985.10867216 Published: 01 October 1985 Article history Received: 18 March 1985 Published: 01 October 1985

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT2-Hydroxyacetophenone: Principal Root Volatile of the East African Medicinal Plant, Carissa edulisMichael D. Bentley, Susan R. Brackett, and Andrew ChapyaCite this: J. Nat. Prod. 1984, 47, 6, 1056–1057Publication Date (Print):November 1, 1984Publication History Published online1 July 2004Published inissue 1 November 1984https://pubs.acs.org/doi/10.1021/np50036a036https://doi.org/10.1021/np50036a036research-articleACS PublicationsRequest reuse permissionsArticle Views147Altmetric-Citations12LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Journal Article Quinolizine Alkaloids from the African Medicinal Plant Calpurnia aurea: Molluscicidal Activity and Structural Study by 2D-NMR Get access Isao Kubo, Isao Kubo Division of Entomology and Parasitology, College of Natural Resources, University of California, Berkeley, California 94720, U.S.A. Search for other works by this author on: Oxford Academic Google Scholar Takeshi Matsumoto, Takeshi Matsumoto Division of Entomology and Parasitology, College of Natural Resources, University of California, Berkeley, California 94720, U.S.A. Search for other works by this author on: Oxford Academic Google Scholar Mutsuo Kozuka, Mutsuo Kozuka Division of Entomology and Parasitology, College of Natural Resources, University of California, Berkeley, California 94720, U.S.A. Search for other works by this author on: Oxford Academic Google Scholar Andrew Chapya, Andrew Chapya Division of Entomology and Parasitology, College of Natural Resources, University of California, Berkeley, California 94720, U.S.A. International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya Search for other works by this author on: Oxford Academic Google Scholar Hideo Naoki Hideo Naoki Division of Entomology and Parasitology, College of Natural Resources, University of California, Berkeley, California 94720, U.S.A. Suntory Institute for Bioorganic Research, Shimamoto-cho, Mishima-gun, Osaka 618, Japan Search for other works by this author on: Oxford Academic Google Scholar Agricultural and Biological Chemistry, Volume 48, Issue 11, 1 November 1984, Pages 2839–2841, https://doi.org/10.1080/00021369.1984.10866598 Published: 01 November 1984 Article history Received: 19 March 1984 Published: 01 November 1984

Abstract The structure of a neo-clerodane diterpene, ajugarin-V isolated from Ajuga remota (Labiatae) has been established by means of spectroscopic and chemical data.

Plumbagin, a naphtoquinone compound was isolated from Plumbago capensis (Plumbaginaceae), an East African medicinal plant. This compound exhibited relatively specific antimicrobial activity against yeasts and potent insect antifeedant activity against the larvae of African army worms.

Screening of East African plants for antimicrobial activity was carried out. The plant materials were collected mainly on the basis of information gathered from"Bwana Mganga"(Swahili) meaning"medicine man"on"dawa ya miti"(Swahili) meaning"medicinal plants". Of 79 extracts from 72 species of plants belonging to 35 families, we found that 40 extracts gave initial positive results indicative of antimicrobial activity against one or more microorganisms. Interestingly, none of the extracts showed activity against Escherichia coli, a gram-negative bacterium.

I. Kubo, Y. Lee, V. Balogh-Nair, K. Nakanishi and A. Chapya, J. Chem. Soc., Chem. Commun., 1976, 949 DOI: 10.1039/C39760000949