3-Methylbutanoic acid

3-Methylbutanoic acid (Isovaleric acid, Delphinic acid, 3-Methylbutyric acid, Isopentanoic acid, β-methylbutyric acid) is a natural fatty acid found in a wide variety of plants and essential oils. It has a strong pungent cheesy or sweaty smell, but its volatile esters have pleasing scents and are used widely in perfumery.