CE-326597 is a potent and selective CCK1R agonist. The type 1 cholecystokinin receptor (CCK1R) has multiple physiologic roles relating to nutrient homeostasis,including mediation of postcibal satiety. The type 1 cholecystokinin (CCK) receptor (CCK1R) is a key mediator of postcibal satiety and a potential target for drugs that may be useful to prevent and or treat obesity.