2-Hydroxy-3-methylbutyric acid (2-hydroxyisovaleric acid) is a metabolite found in the urine of patients with phenylketonuria methylmalonic acidemia propionic acidemia 3-ketothiolase deficiency isovaleric acidemia 3-methylcrotonylglycemia 3-hydroxy-3-methylglutaric acidemia multiple carboxylase deficiency glutaric aciduria ornithine transcarbamylase deficiency glyceroluria tyrosinemia type I galactosemia and maple syrup urine disease.

N-Vanillyloctanamide is a capsaicinoid from the fruits of Capsicum annuum L. var. annuum. N-Vanillyloctanamide reduces the radical length of Lactuca sativa seedling, this inhibition being dose-dependent.

6-Bromovanillin is a biochemical reagent utilized in the synthesis of caridopa, an aromatic amino acid decarboxylase inhibitor.