Endogenous peptide activator of intestinal guanylyl cyclase; secreted mainly by the gastrointestinal mucosa. Regulates water and electrolyte transport in intestinal and renal epithelia.

Palmitoyl CoA lithium (Palmitoyl coenzyme A lithium) is a major component of fatty acids involved in the carnitine shuttle system, beta-oxidation, and the tricarboxylic acid cycle, and can be used to study metabolic disorders in the body.

L-Norleucine is an isomer of leucine specifically affects protein synthesis in skeletal muscle and has antivirus activity.