imidines

https://doi.org/10.1351/goldbook.I02950
Analogues of cyclic acid anhydrides in which $\ce{=O}$ has been replaced by $\ce{=NR}$ and $\ce{–O\bond{–}}$ by $\ce{–NR\bond{–}}$.
molecule
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1342 [Terms] [Paper]