五環(huán)的

Japan selected 75 # high-carbon stainless steel, high hardness pentacyclic spring as a strong core. 選定日本75%23高碳精鋼，五環(huán)高硬度的彈簧作為堅(jiān)強(qiáng)核心。

This review presents the progress in the biotransformation of pentacyclic triterpenes from 1996-2006. 本文綜述了1996年到2006年五環(huán)三萜類化合物的微生物轉(zhuǎn)化研究。

Typical markers are the porphyrins, pristine, phytane, steranes, carotenes and pentacyclic triterpanes. 典型的標(biāo)志如卟啉、姥鮫烷、植烷、留烷、胡蘿卜烷、以及五環(huán)三萜烷。

This article is reviewing the structure-ac-tivity relationship of pentacyclic triterpenes. 筆者討論了一些五環(huán)三萜類化合物的藥理活性與結(jié)構(gòu)的關(guān)系。

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，屬于五環(huán)三萜類，具有抗氧化性及抗癌活性。