A yellowish - white,crystalline purine base,C5H4N4O2,that is a precursor of uric acid and is found in blood,urine,muscle tissue,and certain plants.

• 黄嘌呤一种黄白色结晶的嘌呤硷，C5H4N4O2，它是尿酸的前身，常见于血液、尿液、肌肉组织和某些植物中