Abstract
On the basis of a study of the13C NMR spectra of a base fromVinca erecta previously regarded as “kopsanone,” and the known alkaloid kopsinilam, it has been shown that the former is 5,22-dioxokopsane.
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Additional information
Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 344–346, May–June, 1984.
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Yagudaev, M.R. The NMR investigation of alkaloids. VII.13C NMR spectra and structure of “kopsanone” and kopsinilam. Chem Nat Compd 20, 320–322 (1984). https://doi.org/10.1007/BF00575758
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DOI: https://doi.org/10.1007/BF00575758