Docosadienoic acidDocosadienoic acid is a polyunsaturated very long-chain fatty acid with a 22-carbon backbone and two double bonds.IsomersThe acid exists in several isomeric forms, depending on the positions and configurations of the double bonds. These isomers play important roles in biological systems and are used in chemical synthesis.Physical propertiesInsoluble in water. Soluble in chloroform, hexane, ethanol.Natural occurrenceDocosadienoic acid can be detected in modest concentrations, generally not exceeding 3%, in the seed oils of many plants, particularly Cruciferae and Ranunculaceae.