nonivamide
Nonivamide, also known as N-vanillyl-nonanamide, is a capsaicinoid, a pungent amide structurally related to capsaicin. It is the amide formed from vanillyl alcohol and nonanoic acid, giving it a vanillyl group linked to a nine-carbon acyl chain. In nature, nonivamide occurs in trace amounts in some chili peppers, but most commercial material is produced synthetically for industrial use.
Nonivamide is a potent irritant and a selective agonist of the transient receptor potential vanilloid 1 (TRPV1)
Safety and regulation: Nonivamide should be handled with care; it can irritate skin, eyes, and mucous membranes.