Infrared studies on the isomers of kamlolenic acid

Summary Thecis‐trans and positional configuration of α‐and β‐kamlolenic acids have been investigated. Infrared data of the two isomers, their acetyl derivatives and maleic anhydride adducts, and the permanganate oxidation products of the addition compounds, together with the selective epoxidation of the exocyclic double bond of the maleinated derivatives, have been used to confirm the structure of the three conjugated double bonds in α‐kamlolenic acid ascis‐9‐trans 11‐trans 13. and β‐kamlolenic acid astrans 9‐trans 11‐trans 13.