Peptide derived from the tumor suppressor protein p16; inhibits cyclin-dependent kinase-4 (cdk4)/cyclin D1 (IC50 ~ 1.5 μM) and binds to cdk6.

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.

Quasipanaxatriol can greatly enhance the cytotoxicity of the anti-cancer drugs in P388/ADM cells.