Unsaturated fatty acid nomenclature 8Anomenclature,Indicating the number and position of double bonds counting from carboxylic group or n nomenclature,Indicating the number and position of double bonds counting from methyl group 9 6 HO 8 11 14 20:4△5C,8C,1C,14C 20:406C,9C,12C,15C z△nomenclature, Indicating the number and position of double bonds counting from carboxylic group zω or n nomenclature, Indicating the number and position of double bonds counting from methyl group 15 12 9 △ Unsaturated fatty acid nomenclature 20:4 △5C,8C,11C,14C 20:4 ω 6C,9C,12C,15C