Cholecystokinin (CCK) is a brain gut peptide with multiple molecular forms and dual distribution. It is composed of 33 amino acids and has hormone and neurotransmitter effects. Sincalide is an octapeptide molecule that is a fragment of cholecystokinin. Chemicalbook has all the biological activities of cholecystokinin and is an artificially synthesized Octapeptide. It is mainly used to promote gallbladder contraction, a diagnostic reagent for gallbladder, and clinically used to treat chronic pancreatitis. It was found that pancreatic secretion function has significantly improved and symptoms have been significantly alleviated.