caffeic acid

例句：

1. 1. This compound is responsible for the bitter taste of coffee.
   这种化合物负责咖啡的苦味。
2. 2. The antioxidant properties of caffeic acid have been studied extensively in recent years.
   近年来，人们已经广泛研究了咖啡酸的抗氧化性质。
3. 3. Caffeic acid has been found to have anti-inflammatory effects on the body.
   研究发现，咖啡酸对身体健康具有抗炎作用。