Potent endogenous NPFF receptor agonist (EC50 values are 0.0011 and 29 nM for NPFF2 and NPFF1, respectively). Attenuates contractile function of isolated rat and rabbit cardiac myocytes. Reduces heart rate, stroke volume, ejection fraction and cardiac output, and increases plasma prolactin levels in rats. GnIH homolog.

AC-099 hydrochloride is a selective full agonist of the neuropeptide FF2 receptor NPFF2R (EC50=1189 nM) and partial agonist function of the neuropeptide FF1 receptor NPFF1R (EC50=2370 nM) that reverses opioid-induced nociceptive sensitization, and may be used to study neurological.

Selective galanin GAL1 receptor agonist (Ki values are 0.23 and 5.71 nM for GAL1 and GAL2 receptors respectively). Enhances food consumption in rats following i.c.v. administration and reduces CAP-induced inflammatory pain.