Litorin, an amphibian bombesin peptide derivative, is an bombesin receptor agonist. Litorin stimulates the contraction of smooth muscle, stimulates gastrin, gastric acid, and pancreatic secretion, and suppresses the nutriment in vivo.

Apelin-13 triTFA is the endogenous ligand of the APJ receptor activating this G protein-coupled receptor with an EC50 value of 0.37 nM.

2-(Chloromethyl)imidazo[1,2-a]pyridine has potential anthelmintic activity and can be used to synthesize active compounds.