Tecleanin and 7-deacetylproceranone, two new tetranortriterpenoids from Teclea grandifolia Engl. (Rutaceae), have been assigned structures (2) and (4) respectively. Tecleanin has the same highly oxidised ring A as limonin but a carbocyclic ring D. A third new limonoid was identified as 7-deacetylazadirone (13).
J. F. Ayafor, B. L. Sondengam, J. D. Connolly, D. S. Rycroft and J. I. Okogun, J. Chem. Soc., Perkin Trans. 1, 1981, 1750 DOI: 10.1039/P19810001750
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