aci-nitro compounds

https://doi.org/10.1351/goldbook.A00085
A class name for hydrocarbylideneazinic acids, $\ce{R2C=N^{+}(–O^{−})OH}$. The use of aci-nitro as a prefix in systematic nomenclature to name specific compounds is abandoned.
See also: azinic acids
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]