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New cytotoxic sesquiterpenoids from Siegesbeckia glabrescens
Qian Wu1, Hua Li2, So Yoon Lee3
1Center for Cell Fate Control and College of Pharmacy, Sookmyung Women's University, Seoul 140-742, Korea. wuqiansy@hotmail.com.
Molecules (Basel, Switzerland)
|February 19, 2015
Abstract:
Two new sesquiterpenoids, siegenolides A (1) and B (2), and two known sesquiterpenes 3 and 4 were isolated from Siegesbeckia glabrescens. Their structures were elucidated by spectroscopic analyses, and they were further evaluated for their cytotoxic activities against human cancer cells (MCF-7, AsPC-1, SW480, HCT 116, HepG2, HeLa). Compounds 1-4 showed differential cytotoxic effects on the target cancer cells with IC50 values in the range of 0.9-33.3 μM.
