Ent-kaurene and ent-beyerene diterpenoids and other constituents of Thecacoris batesii
Bonaventure T. Ngadjui, Herve M.P. Poumale, Alphonsine N. Guedem, Merhatibeb Bezabih, Berhanu M. Abegaz
Abstract
Two novel diterpenoids, thecacorins A (1) and B (2), were isolated from Thecacoris batesii and their structures were established as ent-3b,20-epoxy-16-kaurene-3a,12b-diol and ent-15-beyerene-2b,3b-diol, respectively, on the basis of extensive spectroscopic analysis, especially, 1D NMR spectra, in conjunction with 2D experiments, COSY, NOESY, HMQC and HMBC.
KEY WORDS: Diterpenoids, Thecacorin A, Thecacorin B, Ent-3b,20-epoxy-16-kaurene-3a,12b-diol, Ent-15-beyerene-2b,3b-diol, Thecacoris batesii
Bull. Chem. Soc. Ethiop. 2007, 21(1), 89-94.
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Bulletin of the Chemical Society of Ethiopia. ISSN: 1011-3924