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xanthines (zan´thinz),

n.pl a family of chemicals that includes caffeine, theophylline, and theobromine, which stimulate the central nervous system, act on the kidneys to produce diuresis, stimulate cardiac muscle, and relax smooth muscle.
References in periodicals archive ?
As a result, this may not be the best theory on how xanthines exert a therapeutic effect.
Xanthines are another solution in the fight to relieve pulmonary airflow disorders.
Theophylline is related chemically to the natural metabolite xanthine.
Caffeine is one of the few they do not forget as the Xanthines are among the earliest organics they study and one of the most dramatic groups, so Hoechst knew that a Xanthine product was unlikely to be successful.
Chemically, each table contains the active ingredient, Pentoxy-fylline De-Methyl - Xanthine, which is first cousin to caffeine, which is chemically Tri-Methyl Xanthine.