Dynorphin A (1-8) is the predominant opioid peptide identified in placental tissue extracts. Dynorphin A (1-8) is the most likely natural ligand of the kappa receptor. The binding of 3H-Bremazocine to the purified kappa receptor is inhibited by Dynorphin A (1-8) (IC50=303 nM).

Delphinidin-3-O-glucoside chloride has antioxidant activity.

Albizziin is a glutamase inhibitor and is a glutaminyl-tRNA synthetase inhibitor.