ChEBI:Ascr#11 is an (omega-1)-hydroxy fatty acid ascaroside consisting of ascarylopyranose linked glycosidically to the alcoholic hydroxy group of (3R)-3-hydroxybutanoic acid. It has a role as a Caenorhabditis elegans metabolite. It is a monocarboxylic acid and an (omega-1)-hydroxy fatty acid ascaroside. It is functionally related to a (R)-3-hydroxybutyric acid. It is a conjugate acid of an ascr#11(1-).