<unk>  (INN), also known as oxtriphylline, is a cough medicine derived from xanthine that acts as a bronchodilator to open up airways in the lung. Chemically, it is a salt of<unk>  and theophylline. It classifies as an expectorant.[citation needed] The drug is available under the brand names Choledyl and Choledyl SA, among others.
Choline theophyllinate
Methaemoglobin
Glycobiarsol
Dimethylethanolamine
Tetrahydrozoline
Methenamine hippurate
Sodium glycerophosphate
Tetrahydropyran