122998-75-8 Cck 33 (10-20) Cholecystokinin 33 (10-20) L-Glutamine, N2-(N-(N2-(N2-(N-(N-(N-(N-(N2-(N-L-serylglycyl)-L-arginyl)-L-methionyl)-L-seryl)-L-isoleucyl)-L-valyl)-L-lysyl)-L-asparaginyl)-L-leucyl)-