Pyrrolyl 4-quinolone alkaloids from the mangrove endophytic fungus Penicillium steckii SCSIO 41025: Chiral resolution, configurational assignment, and enzyme inhibitory activities
作者:Chun-Mei Chen、Wei-Hao Chen、Xiao-Yan Pang、Sheng-Rong Liao、Jun-Feng Wang、Xiu-Ping Lin、Bin Yang、Xue-Feng Zhou、Xiao-Wei Luo、Yong-Hong Liu
DOI:10.1016/j.phytochem.2021.112730
日期:2021.6
using chiral columns. Their structures including absolute configurations were elucidated by extensive spectroscopic analysis, electronic circular dichroism (ECD) experiments, and single-crystal X-ray diffraction analysis. Structurally, (±)-oxypenicinolines A−D shared with an unusual 6/6/5/5 tetracyclic system incorporating a rare tetrahydro-pyrrolyl moiety. A plausible biosynthetic pathway for pyrrolyl
从红树林衍生的真菌青霉菌SCSIO 41025(SCSIO 41025)中分离出6种未描述的4-喹诺酮生物碱,包括4种外消旋混合物(±)-氧青霉素A-D和2种相关的青霉素F和G以及7种已知类似物。毛虫科)。使用手性柱通过HPLC分离外消旋物。广泛的光谱分析,电子圆二色性(ECD)实验和单晶X射线衍射分析阐明了它们的结构,包括绝对构型。在结构上,(±)-氧青霉素A-D与一个不寻常的6/6/5/5四环系统共享,该系统包含一个罕见的四氢-吡咯基部分。提出了吡咯基4-喹诺酮生物碱的合理生物合成途径。(±)-氧青霉素A和喹喔啉显示α葡萄糖苷酶抑制活性用IC 50的317.8 365.9和值μ分别Μ,这明显高于阿卡波糖(461.0的更有效的 μ M)。此外,青霉素和青霉素E对乙酰胆碱酯酶(AChE)的抑制作用较弱。