Any of a group of organic compounds derived from or structurally related to purine,including uric acid,caffeine,and the nucleic acid constituents adenine and guanine.

• 嘌呤衍生物，从嘌呤衍生出来或在结构上与嘌呤有关的一组有机化合物的任一种，包括尿酸、咖啡因及核酸的组成成分腺嘌呤以及乌嘌呤等。