laevulin

例句：

1. 1.The laevulin in this product is very effective.
   该产品中的laevulin非常有效。
2. 2.The laevulin has been shown to have anti-inflammatory properties.
   研究表明，这种laevulin具有抗炎性质。
3. 3. The laevulin extract is used in the treatment of various skin conditions.
   这种laevulin提取物用于治疗各种皮肤状况。