Theobromine, also known as xantheose, is a bitter alkaloid of the cacao plant, with the chemical formula C7H8N4O2. It is found in chocolate, as well as in a number of other foods, including the leaves of the tea plant, and the kola nut. It is classified as a xanthine alkaloid (more specifically, a methylxanthine), others of which include theophylline and caffeine. Caffeine differs from these compounds in that it has an extra methyl group (see under Pharmacology section).
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