long-chain fatty acid fatty acid 20:3 Any trienoic fatty acid with twenty carbons. FA(20:3) C20:3 icosatrienoic acid icosatrienoic acids chebi_ontology eicosatrienoic acid eicosatrienoic acids CHEBI:36036 FA 20:3 20:3 straight-chain fatty acid trienoic fatty acid icosatrienoate