Abstract
Five new 5,6-β-epoxywithanolides (1–5) were isolated from the whole plants of Physalis minima L. Their structural elucidations were achieved by the extensive spectroscopic analysis (IR, UV, HR-ESI-MS, 1D-NMR, and 2D-NMR). The isolates were evaluated for their anti-inflammatory activities on lipopolysaccharide-induced nitric oxide production in RAW 264.7 cells and cytotoxic activities against three cancer cell lines, viz. A549 lung adenocarcinoma cells, SMMC-7721 hepatic carcinoma cells and MCF-7 breast cancer cells by using the MTT-based assay. All of them possessed moderate inhibition to the production of nitric oxide with IC50 values from 42.18 to 73.26 μM, and the IC50 values of the cytotoxic activities were in the range of 31.25 to 80.14 μM.
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