Structure. Octadecanoids belong to the fatty acyls. Their structure is based on octadecanoic acid, an eighteen carbon atoms long hydrocarbon chain with a carboxyl group. Octadecanoids, eicosanoids, docosanoids, and further lipid groups are collectively termed oxylipins. Their hydrocarbon chain features oxygen-containing substituents, they are oxidized fatty acyls. Often, octadecanoids contain one or more double bonds. … Continue reading Octadecanoids