Show simple item record Ngadjui, B.T. Abegaz, B.M. Keumedjio, F. Folefoc, G.N. Kapchec, G.W.F. 2008-10-27T07:36:21Z 2008-10-27T07:36:21Z 2002
dc.identifier.citation Ngadjui, B.T. et al (2002) Diterpenoids from the stem bark of Croton zambesicus, Phytochemistry, vol. 60, pp. 345–349 en
dc.identifier.issn 0031-9422
dc.description.abstract Three clerodane diterpenoids, crotozambefurans A, B and C were isolated from the stem bark of Croton zambesicus together with the known clerodane crotocorylifuran and two trachylobanes: 7b-acetoxytrachyloban-18-oic acid and trachyloban-7b, 18-diol. Betulinol, lupeol, sitosterol and its 3b-glucopyranosyl derivative were also obtained. The structures of crotozambefurans A, B and C were determined, respectively, as: 15,16-epoxy-1,3,13(16),14-clerodatetraen-20,12-olide-18,19-dioic acid dimethylester, 15,16-epoxy- 1,3,13(16),14-clerodatetraen-18,19,20-trioic acid trimethylester and 15,16-epoxy-3,13(16),14-clerodatrien-19,1a:20,12-diolide-18-oic acid methylester, using spectroscopic analysis, especially, NMR spectra in conjunction with 2D experiments, COSY, HSQC, HMBC and TOCSY. en
dc.language.iso en en
dc.publisher Elsevier Science Ltd. en
dc.subject Croton zambesicus en
dc.subject Euphorbiaceae en
dc.subject Stem bark en
dc.subject Isolation; Clerodane en
dc.subject Crotozambefurans A, B and C en
dc.title Diterpenoids from the stem bark of Croton zambesicus en
dc.type Article en

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