132032-04-3 25-Tyr-28,31-nle-cholecystokinin (25-33) Caerulein, 1-de(5-oxo-L-proline)-2-D-tyrosine-5-L-norleucine-8-L-norleucine- Cck (25-33), tyr(25)-nle(28,31)- Cholecystokinin (25-33), tyr(25)-nle(28,31)- Cholecystokinin (25-33), tyrosyl(28)-norleucine(28,31)-