1. An obsolete term, which should not be used, for @I02949@.
  2. Any @C00852@ having an imino substituent, HN=, replacing two hydrogens. A shortened form of imino carboxylic acid.
  3. Obsolescent term for azaalkanoic acids and azacycloalkane-2-@C00852@, e.g. proline:
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]