New transformation pathway and cytotoxic derivatives from the acid hydrolysis of timosaponin B III
作者:Yun-Fang Zhao、Yu-Wei Zhang、Yinru Wang、Susan L. Morris-Natschke、Wei Liu、Ting-Ting Shang、Hong Yin、Kuo-Hsiung Lee、Xue-Feng Huang
DOI:10.1080/14786419.2018.1499640
日期:2019.10.2
with better biological activity, timosaponin B III was structurally modified via acid hydrolysis to yield one new (2, timopregnane A I) C21 steroidal glycoside and seven known compounds. Their structures were elucidated on the basis of NMR spectroscopy and mass spectrometry. All eight compounds were evaluated for cytotoxic activity against MCF7, SW480, HepG2, and SGC7901 cell lines in vitro. As a result
Timosaponin B III是一种主要的生物活性甾体皂苷,从知母阿米巴碱Bge中分离出来。为了潜在地发现具有更好生物活性的衍生物,通过酸水解对托莫司汀B III进行了结构修饰,以产生一种新的(2,替莫泼亚奈AI)C 21甾体糖苷和7种已知化合物。在NMR光谱和质谱的基础上阐明了它们的结构。所有八个化合物为对MCF7,SW480,HepG2细胞,和SGC7901细胞系的细胞毒活性进行评价体外。结果,化合物6和7表现出显着的活性(IC 502.94–12.2μM)。研究了这些化合物的构效关系,并提供了初步结论。此外,首次发现了动素皂苷B III的酸水解中的新的转化途径。