Cytidine-5'-triphosphate (Cytidine triphosphate) is a compound widely found in living organisms that serves as an energy substance, as a building block for nucleotide and nucleic acid and lipid biosynthesis, and activates protein kinase reactions.

Cytochalasin H is a potent inhibitor of actin incorporation into filaments.

Somatostatin-28 (1-12) is a somatostatin fragment which is monitored in brain tissue to track processing of somatostatin.