azomethine imides
The 1,3-dipolar N-imides of azomethines having the structure
The term azo ylides, derived from the second resonance form, has also been used.
See: imides (2), ylides
PAC, 1995, 67, 1307 (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1321