Kinevac (Sincalide for Injection) is a cholecystopancreatic-gastrointestinal hormone peptide for parenteral administration. The agent is a synthetically-prepared C-terminal octapeptide of cholecystokinin. Each vial of sincalide provides a sterile nonpyrogenic lyophilized white powder consisting of 5 mcg sincalide with 45 mg sodium chloride to provide tonicity; sodium hydroxide or hydrochloric acid may have been added prior to lyophilization for pH adjustment (5.5 to 6.5). At the time of manufacture, the air in the vial is replaced with nitrogen. Sincalide is designated chemically as L-aspartyl-L-tyrosyl-L-methionylglycyl-L-tryptophyl-L-methionyl-Laspartylphenyl-L-alaninamide hydrogen sulfate (ester).

It has the following molecular formula C₄₉H₆₂N₁₀O₁₆S₃ with a molecular weight of 1143.27.

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