Fentonium bromide (INN) is an anticholinergic and antispasmodic atropine derivative. In the US its patent number is 3,356,682. It is sold by Sanofi-Aventis and Zambon. References Tropanes Quaternary ammonium compounds Bromides Aromatic ketones Primary alcohols Carboxylate esters Biphenyls Muscarinic antagonists