Lycodine-Type Alkaloids from Lycopodiastrum casuarinoides and Their Acetylcholinesterase Inhibitory Activity
作者:Dong-Bo Zhang、Jian-Jun Chen、Qiu-Yan Song、Li Zhang、Kun Gao
DOI:10.3390/molecules19079999
日期:——
Four new lycodine-type alkaloids, namely 16-hydroxyhuperzine B (1), N-methyl-11-acetoxyhuperzine B (2), 8,15-dihydrolycoparin A (3) and (7S,12S,13R)-huperzine D-16-O-β-d-glucopyranoside (4), along with ten known analogues 5-14, were isolated from the whole plant of Lycopodiastrum casuarinoides. The structures of the new compounds were elucidated by means of spectroscopic techniques (IR, MS, NMR, and
四种新型石杉碱型生物碱,即 16-羟基石杉碱 B(1)、N-甲基-11-乙酰氧基石杉碱 B(2)、8,15-二氢石杉碱 A(3) 和 (7S,12S,13R)-石杉碱 D-16 -O-β-d-吡喃葡萄糖苷 (4),连同十个已知的类似物 5-14,是从木麻黄石松的全株植物中分离出来的。通过光谱技术(IR、MS、NMR和CD)和化学方法阐明了新化合物的结构。化合物1和2具有四个相连的六元环,而化合物3和4是哌啶环裂解产物。其中,化合物4为首次报道的石松生物碱苷。在分离出的化合物 N-去甲基石杉碱 (7)、石杉碱 C (8)、石杉碱 B (9) 和番茄红素 C (13) 中,对乙酰胆碱酯酶具有显着的抑制活性,新化合物1显示出中等抑制活性。讨论了构效关系。