Piperonyl butoxide (PBO) is a man-made pesticide synergist, working with insect killers to increase their effectiveness.

Tafluprost is a novel prostaglandin analog with a high affinity for the fluoroprostaglandin (FP) receptor PGF2α. A prostanoid selective FP receptor agonist.

Gadopentetate Dimeglumine, a complex of gadolinium with a chelating agent, diethylenetriamine penta-acetic acid, is an extracellular intravenous contrast agent used in magnetic resonance imaging.

Ecabet sodium is a widely employed mucoprotective agent for the treatment of gastric ulcers.

Tryptophol is an aromatic alcohol found as a secondary product of alcoholic fermentation that induces sleep in humans.

Indole-3-carboxylic acid is a normal urinary indolic tryptophan metabolite which belongs to a class of organic compounds known as indolecarboxylic acids and derivatives.

Oxindole is an aromatic heterocyclic organic compound which causes sedation, muscle weakness, hypotension, and coma when dosed in excess.

Squalene, a naturally occurring substance found in plants, animals and humans, is a component of some adjuvants that is added to vaccines to enhance the immune response.