Isonipecotic Acid or Hexahydroisonicotinic acid is a saturated heterocyclic compound featuring a piperidine ring with a carboxylic acid substituent at the 4-position. Isonipecotic Acid is also called as 4-Piperidinecarboxylic acid as it functions as a partial agonist at GABAA receptors, making it valuable in neurological research. Additionally, Isonipecotic Acid (CAS: 498-94-2) is High-purity piperidine derivative used as a pharmaceutical intermediate and in the synthesis such as HDAC inhibitors and piperidine-based derivatives. Available in various grades for research and synthesis, Isonipecotic Acid is generally employed as an intermediate in the synthesis of pharmaceuticals targeting neurological pathways. Isonipecotic Acid is significant in research focused on inhibitory neurotransmission.