fatty acid 18:2 octadecadienoate octadecadienoic acid 18:2 Any straight-chain, C18 polyunsaturated fatty acid having two C=C double bonds. 0 CHEBI:25627 C18:2 PMID:6794350 280.446 C18H32O2 280.24023 FA (18:2) CAS:26764-25-0 octadecadienoic acid chebi_ontology polyunsaturated fatty acid octadecanoid olefinic fatty acid straight-chain fatty acid