BACKGROUND &AIM: Betulin is an important triterpene. We investigated the antitumor activity of betulin,extracted from the bark of silver birch(Betula platyphylla Suk).

• 背景与目的白桦酯醇是一种重要的三萜类生物活性分子,本文从白桦树皮中提取获得白桦酯醇纯品,然后研究该生物活性分子抑制食管癌细胞的活性。