Punicic acid

Punicic acid (also called trichosanic acid) is a polyunsaturated fatty acid, 18:3 "cis"-9, "trans"-11, "cis"-13. It is named for the pomegranate, ("Punica granatum"), and is obtained from pomegranate seed oil. 
It is also found in the seed oils of snake gourd.
Punicic acid is a conjugated linolenic acid or CLnA; i.e. it has three conjugated double bonds. It is chemically similar to the conjugated linoleic acids, or CLA, which have two. It has been erroneous classified as "n-5" or "omega-5" polyunsaturated fatty acid because the last double bond is located five carbons from the terminal "omega" carbon, but the "n-x" notation can only be applied to all "cis", methylene-interrupted polyunsaturated fatty acids ^source?.
In lab rats, punicic acid was converted to the CLA rumenic acid (9Z11E-CLA). "In vitro", it shows anti-invasive activity against prostate cancer cells. OLETF rats—a strain which becomes obese—remained relatively lean when punicic acid was added to their feed. 