SCHEDULED MAINTENANCE
The stem bark of Gymnosporia emarginata(Willd.) Hook f. ex. Thw. (Celastraceae) contains a number of triterpenes including a new oxygenated lupane, 3-oxolup-20(29)-en-30-al (1) and two related lupanes, 3β-hydroxylup-20(29)-en-30-al (2) and 30-hydroxylup-20(29)-en-3-one (3). The structures of these compounds have been established by spectroscopic and chemical methods.
D. B. T. Wijeratne, V. Kumar and M. U. S. Sultanbawa, J. Chem. Soc., Perkin Trans. 1, 1981, 2724 DOI: 10.1039/P19810002724
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