4-[(Z,13R,14R)-13,14-dihydroxytriacont-17-enyl]-2-methyl-2H-furan-5-one is a long-chain fatty acid–derived lactone featuring a 30-carbon aliphatic backbone with a cis double bond at the 17th carbon and two stereospecific hydroxyl groups at C13 and C14 in the R configuration. The terminal portion of this chain is linked to the 4-position of a 2-methylfuran-5-one ring, a five-membered lactone with a methyl substituent at C2.