xanthine

【化】黄质; 黄嘌呤, 羟基嘌呤

xanthine

[化]黄嘌呤

xanthine

a crystalline compound related in structure to uric acid and found in urine, blood, certain plants, and certain animal tissues. Formula: C&-{5}H&-{4}N&-{4}O&-{2}

any substituted derivative of xanthine, esp one of the three pharmacologically active methylated xanthines, caffeine, theophylline, or theobromine, which act as stimulants and diuretics

xanthine

1. crystalline oxidation product of the metabolism of nucleoproteins; precursor of uric acid; found in many organs and in urine

(hypernym)