has role has role is conjugate acid of fatty acid 20:4 long-chain fatty acid icosatetraenoic acid 20:4 CHEBI:36033 eicosatetraenoic acids eicosatetraenoic acid C20:4 icosatetraenoic acid icosatetraenoic acids A 20-carbon, polyunsaturated fatty acid having four double bonds at unspecified positions. chebi_ontology olefinic fatty acid icosatetraenoate human metabolite Caenorhabditis elegans metabolite