Source:http://linkedlifedata.com/resource/umls/id/C0000658
MSH: A 20-carbon-chain fatty acid, unsaturated at positions 8, 11, and 14. It differs from arachidonic acid, 5,8,11,14-eicosatetraenoic acid, only at position 5.,NCI: A polyunsaturated long-chain fatty acid with a 20-carbon backbone and 3 double bonds, originating from the 6th, 9th and 12th positions from the methyl end, with all bonds in the cis- configuration.,NCI: Polyunsaturated fatty acid with 20 carbons and 3 double bonds at the 6th, 9th and 12th carbons from the methyl end.