Ursolic acid, a pentacyclic triterpene compound, naturally occurs in a large variety of plants, has attracted considerable interest owing to its significant biological activities.
熊果酸属于五环三萜类化合物，广泛存在于天然植物中，具有多种显著的药理活性。
Ginsenoside, the main components of ginseng, is dammarane tetracyclic triterpenoids or hong resin alkyl type pentacyclic triterpene, which has not yet been synthesized artificially.
其主要功能成分是人参皂苷，即达玛烷型四环三萜类或香树脂烷型五环三萜类化合物，至今人参皂苷尚未能人工合成。
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