p2Ca, a naturally processed peptide that derives from a ubiquitous enzyme, alpha-ketoglutarate dehydrogenase, and is recognized in association with the class I MHC protein, Ld, by a CTL clone (2C).

Glycyrrhizin-6′′-methylester (compound 22) is a glycyrrhizin that can be isolated from licorice root. Glycyrrhizin-6′′-methylester can participate as an aglycone in the formation of methyl glucuronate, producing a sweet and licorice taste, but no bitterness. This reveals the importance of the free carboxyl group on the glycoside cone-bound glucuronic acid for natural sweetness and licorice taste.

Neuropeptide SF human augments paraventricular corticotrophin-releasing hormone (CRH) release and increases adrenocorticotropic hormone (ACTH) and corticosterone levels in the plasma. Neuropeptide SF human play a physiologic role in the regulation of such circadian functions as the activity of motor centers and the HPA axis, through the release of CRH.