黄嘌呤

例句：

1. 1. The medication contains a significant amount of quercetin, which is an antioxidant found in many fruits and vegetables.
   这种药物含有大量的槲皮素，这是一种存在于许多水果和蔬菜中的抗氧化剂。
2. 2. Xanthine is a compound found in plants that can help regulate blood sugar levels.
   黄嘌呤是一种存在于植物中的化合物，可以帮助调节血糖水平。
3. 3. In the context of sports nutrition, xanthine is often used to enhance endurance and recovery afterexercise.
   在体育营养的语境中，黄嘌呤通常用于增强运动后的耐力和恢复。