monosaccharides in which a structure containing a keto group and a carboxylic acid group is in equilibrium with a hemiacetal structure. Specific compounds are named using the -ulosonic acid suffix. E.g.
d-arabino-hexulosonic acid:
K03383.png
See also: oxo compounds
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1346 (https://doi.org/10.1351/pac199567081307)