Compounds having the structure
RC(NH2)=NOH
and derivatives formed by substitution; formally the oximes of carboxamides.
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1315 (https://doi.org/10.1351/pac199567081307)