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冬凌草乙素(Rubscensine B)是继冬凌草甲素(Rubscensine A)后,从冬凌草中提取的另一苦味二萜成分。在化学结构上跟冬凌草甲素相似,所不同的是14位上没有OH基,而有与20位的氧桥。实验表明,它也是抗肿瘤及抗菌有效成分之一。
Rubscensine B is another bitter triterpene component extracted from Rubescens after Rubscensine A. In the chemical structure with Rubescens A similar, the difference is no OH group 14, but with 20 and the oxygen bridge. Experiments show that it is also one of the anti-tumor and anti-bacterial active ingredients.