nitrosimines

https://doi.org/10.1351/goldbook.N04168
N-Nitroso iminesO=NN=CR2.
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1352 (https://doi.org/10.1351/pac199567081307)