aminoxides

https://doi.org/10.1351/goldbook.A00284
The anion H2N–O, aminoxide and its N hydrocarbyl derivatives R2N–O; formally derived from hydroxylamines, R2N–OH, by removing a hydron from the hydroxy group, e.g.
(CH3)2N–O
dimethylaminoxide.
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1317 (https://doi.org/10.1351/pac199567081307)