Galactose 1-phosphate is an intermediate in the galactose metabolism and nucleotide sugars metabolism pathways.

Orexin A human, rat, mouse, a 33 amino acid excitatory neuropeptide, orchestrates diverse central and peripheral processes. Orexin A human, rat, mouse has been used to study its effect on the functioning of porcine pancreatic islets. It has also been used as an orexin receptor 1 (OX1R) antagonist to study the effect of orexin systems in the effect of etonogestrel on respiratory response to prolonged metabolic acidosis.

Hexaminolevulinate hydrochloride has approved for cystoscopic detection of papillary bladder cancer and it also is a fluorescent agent.