4-Hydroxybenzoic acid is a monohydroxybenzoic acid, a phenolic derivative of benzoic acid. It is a white crystalline solid that is slightly soluble in water and chloroform but more soluble in polar organic solvents such as alcohols and acetone.

Stearoyl-L-carnitine chloride (Acylcarnitine C18:0) is a long-chain acylcarnitine found in the cerebellum that inhibits GlyT2 and is an important component in the study of lipid metabolism.

1R,3S-RSL 3 is a harmala alkaloid.