N-(Benzo-15-crown-5)-1,2,4-tyriazol-3,5-dione is used to prepare an ‘electrospray active’ derivative of vitamin D; this general method could be applied to electrospray ionisation mass spectrometry of biomedically important products, which are not normally observable.
S. R. Wilson, Q. Lu, M. L. Tulchinsky and Y. Wu, J. Chem. Soc., Chem. Commun., 1993, 664 DOI: 10.1039/C39930000664
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