Prostanoic acidProstanoic acid is a saturated [fatty acid] that contains a cyclopentane ring. Its derivatives are prostaglandins - physiologically active lipid substances. Prostanoic acid is not found in nature, but it can be synthesized in vitro.SynthesisFor the first time, the synthesis of prostanoic acid from 1-formylcyclopentene was considered in detail in the scientific literature in 1975 by a group of French pharmacists. One year later, a group of Japanese scientists, who worked in the central research laboratory of the "Sankyo Co., Ltd." company, published another method for obtaining prostanoic acid from 2- acetic acid. In 1986, a group of Japanese scientists from Kyushu University in Fukuoka proposed their own scheme for obtaining prostanoic acid from limonene.