Dimethylmatairesinol (compound 8) is a lignan compound isolated from the seed of Hernandia nymphaeifolia. Dimethylmatairesinol shows cytotoxicity against the KKU-M156 and HepG2 cell line with IC50s of 5.4 μM (Emax 59%) and 5.2 μM (Emax 78%), respectively.

β-Endorphin, an endogenous opioid neuropeptide, is an opioid receptor agonist. β-Endorphin binds preferentially to μ-opioid receptors and is produced in certain neurons of the central and peripheral nervous system and is one of three endorphins produced in humans. β-Endorphin can be used to reduce stress and maintain homeostasis in the body and is involved in neurological pain perception regulation.

Peptide B, bovine