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Sureshan KM, Murakami T, Watanabe Y. Total syntheses of cyclitol based natural products from myo-inositol: brahol and pinpollitol. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.03.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Igoli JO, Onyiriuka SO, Letzel MC, Nwaji MN, Gray AI. Cassane diterpenoids from Lonchocarpus laxiflorus. Nat Prod Commun 2008. [DOI: 10.1177/1934578x0800300102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Phytochemical investigation of the stem bark of Lonchocarpus laxiflorus yielded three new cassane diterpenoids, lonchocassane A [cassa-13 (14), 15-dien-18, 20-dioic acid], lonchocassane B [cassa-13 (14), 15-dien-20-oxo-18-oic acid] and lonchocassane C [cassa-13 (14), 15-dien-20-carboxyl-18-methylcarboxylate]. The known compounds betulinic acid, betulinic acid acetate, betulin, lupeol, lupenone, trilinoleate, hexacosanyl and triacontanyl caffeates, 4-hydroxy-4-methylpentan-2-one, β-sitosterol, β-sitosterol acetate and stigmasterol were also isolated. The structures and identities of the compounds were established by spectroscopic methods.
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Affiliation(s)
- John O. Igoli
- Department of Chemistry, University of Agriculture, P. M. B. 2373, Makurdi, Nigeria
| | - Samuel O. Onyiriuka
- Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Nigeria
| | - Matthias C. Letzel
- Fakultät für Chemie, Organische Chemie I, Universität Bielefeld, 33501 Bielefeld, Germany
| | - Martin N. Nwaji
- Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Nigeria
| | - Alexander I. Gray
- Natural Products Research Group, Division of Pharmaceutical Sciences, SIPBS, University of Strathclyde, 27 Taylor Street, Glasgow G4 ONR, UK
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