Conclusions
On the basis of an analysis of the NMR spectra of ungminorine, ungminorine diacetate, and dihydroungminorine diacetate the correctness of the structures proposed previously has been shown and the orientation of the substituents in ring C has been determined.
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References
M. Normatov, Kh. A. Abduazimov, and S. Yu. Yunusov, DAN UzbekSSR, no. 9, 23, 1961; Uzb. khim. zh., no. 2, 25, 1965.
N. Bhacca and D. Williams, Applications of NMR Spectroscopy in Organic Chemistry [Russian translation], Moscow, 1966.
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Khimiya Prirodnykh Soedinenii, Vol. 5, No. 2, pp. 99–102, 1969
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Yagudaev, M.R., Abduazimov, K.A. & Yunusov, S.Y. NMR spectra and structure of ungminorine. Chem Nat Compd 5, 85–86 (1969). https://doi.org/10.1007/BF00633283
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DOI: https://doi.org/10.1007/BF00633283