has functional parent long-chain fatty acid arachidic acid branched-chain saturated fatty acid methyl-branched fatty acid 18-methylicosanoic acid 18-methylarachidic acid 18-methyleicosanoic acid 18-methylicosanoic acid 326.318 326.55700 A methyl-branched fatty acid that is arachidic acid substituted by a methyl group at position 18. Anteisoheneicosanoic acid C21H42O2 CAS:36332-93-1 CCC(C)CCCCCCCCCCCCCCCCC(O)=O CHEBI:84877 InChI=1S/C21H42O2/c1-3-20(2)18-16-14-12-10-8-6-4-5-7-9-11-13-15-17-19-21(22)23/h20H,3-19H2,1-2H3,(H,22,23) LIPID_MAPS_instance:LMFA01020018 PMID:17718471 PMID:2721159 PMID:9519472 Reaxys:1726967 WSRCOZWDQPJAQT-UHFFFAOYSA-N chebi_ontology