Ketoisanic acid


Ketoisanic acid is a linear fatty acid composed of 18 carbon atoms, with two triple bonds in the positions 9≡10 and 11≡12, a double bond in the position 17=18, and a ketone substituent in the position 8. This is one of the rare polyacetylenic acids with conjugated triple bonds, the oxygenated isanic acid.

Natural occurrence

The acid can be detected, at concentrations of 1–3%, together with isanic and isanolic acid, in the seed oil of the tree Ongokea gore or Ongokea klaineana; both are plants from equatorial Africa, called "isano" in the local language.