nitrones

synonym: azomethine oxides
https://doi.org/10.1351/goldbook.N04164
The N-oxides of imines, that have the structure $\ce{R2C=N+(O−)R'}$ ($\ce{R'} \neq \ce{H}$). Synonymous with azomethine oxides. N-Oxides $\ce{R2C=N+(O−)H}$ may be included.
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1351 [Terms] [Paper]