CCK-B Receptor Antagonist 2 is a potent and orally active antagonist of Gastrin CCK-B (IC50: 0.43 nM). It also inhibits gastrin CCK-A activity (IC50: 1.82 μM).
RP-72540 is a cholecystokinin B receptor antagonist. RP 72540 showed selectivity factors in express of 200 for CCKA versus CCKBreceptors and also had high affinity for gastrin binding sites in the stomach. Administration of RP-72540 resulted in a dose-de