Theobromine (dimethyl-xanthine) is the active principal of the cacao or cocoabean. It is an alkaloid crystalline powder with a bittertaste closely resembling caffeine and sometimes used as a diuretic and has been found to be an effective cough suppressant, more effective than codeine - eating chocolate, particularly plain chocolate, or drinking cocoa can be an effective remedy for coughing. Research Theobromine
Xanthine is a nitrogenous compound closely allied to uric acid, that occurs in extract of meat and in tea. It forms a colourless powder slightly soluble in water, and yields alloxan and urea on oxidation. Research Xanthine
 
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