Spectrométrie de Masse de Pyrazoline‐5‐Ones N1 Substituées. 1. 5‐AlkoXypyrazoles et 3‐Pyrazoline‐5‐Ones A Structures Fixes

The mass spectra of fixed pyrazolin-5-ones (5-alkoxypyrazoles and 3-pyrazolin-5-ones) are reported and discussed. Mass spectrometry allows characterization of these two isomeric structures.

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