Abstract
The structure of a base isolated from the aerial part of Phlomis regelii as a solvate of the pyrrolidine alkaloid betonicin with urea in a 1:1 ratio was solved. A three-dimensional framework of intermolecular H-bonds was formed by the betonicin and urea molecules in the crystal. The inclusion of a urea molecule in the complex results in stable heteromolecular associates that persist during isolation of the alkaloid.
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Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 46–48, January–February, 2005.
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Razzakov, N.A., Tashkhodzhaev, B., Aripova, S.F. et al. Associate of Betonicin with Urea from Phlomis regelii . Chem Nat Compd 41, 56–59 (2005). https://doi.org/10.1007/s10600-005-0074-2
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DOI: https://doi.org/10.1007/s10600-005-0074-2