The isolation of six friedelane derivatives from the root-bark of Salacia prenoides, and the identification of four of them as friedel-1-en-3-one (II), friedelane-1,3-dione (V), 1,3-dioxofriedelan-24-al (VI), and 7α-hydroxy-friedelane-1,3-dione (VII) by chemical and spectroscopic means, is described.
N. C. Tewari, K. N. N. Ayengar and S. Rangaswami, J. Chem. Soc., Perkin Trans. 1, 1974, 146 DOI: 10.1039/P19740000146
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