https://doi.org/10.1351/goldbook.I02959
  1. An obsolete term, which should not be used, for @[email protected]
  2. Any @[email protected] having an imino substituent, HN=, replacing two hydrogens. A shortened form of imino carboxylic acid.
  3. Obsolescent term for azaalkanoic acids and [email protected]@, e.g. proline:
    I02959.png
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1343 [Terms] [Paper]