Cimifrigines A–G, cytotoxic triterpenes with an oxime group from the flowers of Cimicifuga frigida
作者:Yin Nian、Hui Yan、Xiao-Nian Li、Lin Zhou、Ming-Hua Qiu
DOI:10.1039/c7ra07275a
日期:——
including three aglycones, cimifrigines A–C (1–3), and four glycosides, cimifrigines D–G (4–7), were purified from the flowers of Cimicifuga frigida. These triterpenoids are characterized by an oxime group at C-15. Spectroscopic analyses and X-ray crystallography were used to determine the new structures. In the in vitro cytotoxicity screening, glycosides (4–7) exhibited more noticeable activities than the
七种新的达苏里诺型三萜衍生物,包括三种苷元,辛基三嗪A–C(1-3)和四种糖苷,辛基三嗪D–G(4–7),是从Cimicifuga frigida的花中纯化得到的。这些三萜类化合物的特征在于在C-15处有肟基。使用光谱分析和X射线晶体学确定新结构。在体外细胞毒性筛选中,糖苷(4-7)对人HL-60,SMMC-7721,A549,MCF-7和SW-480细胞系比糖苷类(1-3)表现出更明显的活性。有趣的是,化合物5和7带有2'- O糖单元上的-乙酰基部分显示出与阳性对照顺铂相当的细胞毒性(IC 50:0.5至5.4μM)。而没有2'- O-乙酰基的类似物4和6表明活性较弱,IC 50值为8.9-14.3μM。