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    STUDIA PHYSICA - Issue no. SPECIAL ISSUE / 2001  
  Article:   SYNTHESIS OF [1, 3 - 15N2] URACIL.

  Abstract:  The synthesis of 15N labelled uracil, using CO(15NH2)2 as starting isotopically labelled material, is presented. The experimental procedure is an adaptation of the synthesis methods for the corresponding unlabelled compounds. Urea - 15N2 used as starting material was obtained from H15NO3 (99 at. % 15N) produced at the National Institute for Reasearch and Development of Isotopic and Molecular Technologies. The uracil structure was confirmed using the mass spectrometry method and the isotopic label was determined by mass spectrometry on the molecular compound.  
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