ursanic acid

例句：

1. 1.Ursanic acid is a compound that has been used in medicine for centuries.
   乌桑酸是一种在医学上使用了几个世纪的药物。
2. 2.The research team discovered a new way to synthesize ursanic acid from natural sources.
   研究小组发现了一种从自然来源合成乌桑酸的新方法。
3. 3.Due to its anti-cancer properties, ursanic acid has gained popularity as a dietary supplement.
   由于其抗癌性质，乌桑酸作为一种膳食补充剂而受到欢迎。