pentacyclic triterpenoids的用法和樣例：
例句
- This article is reviewing the structure-ac-tivity relationship of pentacyclic triterpenes.
筆者討論了一些五環三萜類化合物的藥理活性與結構的關係。 - Maslinic or crataegolic acid is a pentacyclic terpene with antioxidant and anticancer effects found in wax from olie skin, alongside oleanolic acid.
山楂酸是從橄欖皮中的蠟狀物中提取出來的，屬於五環三萜類，具有抗氧化性及抗癌活性。
