Anserine is a dipeptide containing β-alanine and histidine, which can be found in the skeletal muscle and brain of mammals and birds.?

3-Hydroxyanthranilic acid also known as 2-amino-3-hydroxy-benzoate or 3-ohaa belongs to the class of organic compounds known as hydroxybenzoic acid derivatives. 3-Hydroxyanthranilic acid has been found in human epidermis and bladder tissues and has also been detected in multiple biofluids such as urine and blood.

5α-Cholestane belongs to the class of organic compounds known as cholestane steroids.