Effects of Enantiomerically Pure β-Carboline Alkaloids from Picrasma quassioides on Human Hepatoma Cells
作者:Wen-Yu Zhao、Jing-Jie Chen、Chun-Xin Zou、Wei-Yu Zhou、Guo-Dong Yao、Xiao-Bo Wang、Bin Lin、Xiao-Xiao Huang、Shao-Jiang Song
DOI:10.1055/a-0879-4721
日期:2019.5
with 2 known achiral congeners (7: - 8: ) were isolated from the stems of Picrasma quassioides. Their structures were elucidated on the basis of extensive spectroscopic analyses and quantum mechanical calculations. Compound 5: possesses a 4,5-seco β-carboline framework and represents the first example of this type of β-carboline alkaloids from nature. A possible biosynthetic pathway is proposed to generate
四对β-咔啉对映体(1A:/ 1B:-4A:/ 4B:),2个具有单个对映体构型的β-咔啉衍生物(5:-6:)和2个已知的非手性同类物(7:-8 :)分离自拟青假单胞菌的茎。在广泛的光谱分析和量子力学计算的基础上阐明了它们的结构。化合物5:具有4,5-secoβ-咔啉骨架,是自然界中此类β-咔啉生物碱的第一个实例。提出了可能的生物合成途径以生成外消旋体4:和对映体纯的化合物5:和6:。筛选所有分离株对肝细胞癌Hep3B和HepG2细胞的细胞毒性,这表明对映体化合物4A:和4B:在HepG2细胞中具有独特的作用。