Abstract
The 70% ethanolic extract of Artemisia vulgaris showed preferential cytotoxicity against PANC-1 human pancreatic cancer cells under a nutrient-deprived condition with PC50 12.5 μg/mL. A phytochemical investigation of this extract yielded a new bicyclic [4:3:0] sesquiterpene named (+)-vulgaric acid (1), together with eight previously reported compounds. The structural elucidation of 1 was achieved by HRFABMS and NMR analysis. The absolute configuration of 1 was deduced by computational calculations of ECD data. All isolated compounds were tested for preferential cytotoxicity against PANC-1 cells, and apigenin (3) showed the strongest activity with PC50 30.7 μM.
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