Nonivamide

Capsaicin, also known as hot pepper, is the active ingredient of red peppers of the genus Capsicum. It is irritating to mammals, including humans, and can produce a burning sensation in the skin. Capsaicin and some of its related compounds are collectively called capsaicinoids, which may be secondary metabolites produced by peppers to prevent herbivores from gnawing and fungi from parasitizing. Generally, birds are not sensitive to capsaicinoids. Pure capsaicin is a hydrophobic, lipophilic, colorless, and odorless crystalline or waxy compound.