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.
See also: dipolar compounds