On the basis of chemical and spectroscopic (especially n.m.r.) evidence, ponicidin was assigned the structure ent-7β,20:14β,20-diepoxy-1β,6α,7α-trihydroxykaur-16-en-15-one (1). The results of an o.r.d. determination established its absolute configuration.
E. Fujita, M. Taoka, M. Shibuya, T. Fujita and T. Shingu, J. Chem. Soc., Perkin Trans. 1, 1973, 2277 DOI: 10.1039/P19730002277
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