Conclusions
Results of a comparative study of the NMR and mass spectra of ervine and hydroxyindole-ervine have shown that ervine belongs to the heteroyohimbine alkaloids in which the C/D rings have a trans linkage and the D/E rings a cis linkage and the CH3 group at C19 has the β-axial configuration.
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References
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Khimiya Prirodnykh Soedinenii, Vol. 6, No. 3, pp. 346–347, 1970
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Malikov, V.M., Yunusov, S.Y. The structure of ervine. Chem Nat Compd 6, 345–346 (1970). https://doi.org/10.1007/BF00567316
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DOI: https://doi.org/10.1007/BF00567316