Nitric oxide inhibitory coumarins from the roots and rhizomes of Notopterygium incisum
作者:Xikang Zheng、Yuemei Chen、Xiaoli Ma、Chen Zhang、Zhengren Xu、Yong Jiang、Pengfei Tu
DOI:10.1016/j.fitote.2018.10.002
日期:2018.11
Phytochemical study on the roots and rhizomes of Notopterygium incisum resulted in the isolation of six new coumarins, notoptetherins A - F (1-6), and 20 known analogues (7-26). Their structures were elucidated on the basis of extensive analyses of NMR and HRMS data, and the absolute configurations of 5 and 6 were established by Mo2(AcO)4-induced CD and exciton chirality, respectively. Moreover, a
对切菜夜蛾根和根茎的植物化学研究导致分离出六种新的香豆素,notoptetherins A-F(1-6)和20种已知的类似物(7-26)。在广泛分析NMR和HRMS数据的基础上阐明了它们的结构,并分别由Mo2(AcO)4诱导的CD和激子手性确定了5和6的绝对构型。此外,采用仿生法从21合成6,以确认其绝对构型。在随后的活性筛选中,化合物12和17在RAW 264.7细胞中表现出对LPS诱导的一氧化氮生成的有效抑制作用,IC50值分别为12.7和10.2μM。