Abstract：
Under the guidance of antioxidant evaluation combined with molecular networking, six pairs of enantiomeric lignans including seven undescribed ones (1a, 2a/2b-4a/4b), along with five known analogs (1b, 5a/5b-6a/6b) were isolated from Cimicifuga heracleifolia Kom. Their structures were determined by extensive spectroscopic data analysis, including HRESIMS, 1D and 2D NMR, experimental and calculated ECD. All the enantiomeric isolates were evaluated for antioxidation by 2, 2-diphenyl-1-picrylhydrazyl (DPPH) and 2, 2\'-azino-bis (3-ethyl-benzothiazoline-6-sulfonic acid) (ABTS) free radical scavenging tests. Compounds 1a and 3a/3b exhibited great DPPH and ABTS scavenging activities. The results are of great value for understanding structurally interesting enantiomeric lignans with antioxidant activity from C. heracleifolia in depth and providing its further development in functional evaluation and drug development.
摘要：
在抗氧化剂评价结合分子网络的指导下,六对对对映体木脂素，包括七个未描述的对映体木脂素(1a，2a/2b-4a/4b)，以及五种已知的类似物(1b，5a/5b-6a/6b）分离自升麻。它们的结构是通过广泛的光谱数据分析确定的，包括HRESIMS,1D和2DNMR，实验和计算ECD。通过2，2-二苯基-1-吡啶酰肼（DPPH）和2，2'-偶氮-双（3-乙基-苯并噻唑啉-6-磺酸）（ABTS）自由基清除试验评估了所有对映体分离物的抗氧化能力。化合物1a和3a/3b表现出较强的DPPH和ABTS清除活性。该结果对于深入了解C.heracleifolia具有抗氧化活性的结构有趣的对映体木脂素具有重要价值，并为其在功能评估和药物开发中的进一步开发提供了帮助。
