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