Vanillyl mandelic acid (VMA) is a chemical intermediate in the synthesis of artificial vanilla flavorings and is an end-stage metabolite of the catecholamines, epinephrine, and norepinephrine.

Ranatensin is a undecapeptide and a Bombesin Receptor angonist, can be isolated from amphibian skin, such as the frog, Rana pipiens. Ranatensin could maintain the dynamic balance of animal blood pressure, without cross-tachyphylaxis with Angiotensin amide, Bradykinin , or Norepinephrine .

Neuromedin U,a 23-amino acid brain-gut peptide, regulates several important physiological functions through its cognate receptor NMUR2 in the central nervous system, including energy balance, stress response, and nociception.