hydroxycaffeine

例句：

1. 1. This new drug contains hydroxycaffeine, which is known to have a stimulating effect on the central nervous system.
   这种新药含有羟基咖啡因，已知对中枢神经系统有刺激作用。
2. 2. The caffeine in this drink is derived from hydroxycaffeine, making it an effective energy booster.
   这种饮料中的咖啡因来源于羟基咖啡因，使其成为有效的能量增强剂。
3. 3. Hydroxycaffeine has been shown to improve cognitive function and reduce anxiety in some studies.
   一些研究表明，羟基咖啡因可以改善认知功能并减少焦虑。