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Quercetin-3-methyl ether at 20 μM is cytotoxic to JB6 P+ cells. (A) Chemical structure of quercetin-3-methyl ether. (B) Cells were treated with quercetin-3-methyl ether (0–20 μM) or its vehicle, dimethyl sulfoxide, as a negative control in 5% FBS/EMEM for 24 or 48 h. Cell viability was determined by (3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium) assay. Data are represented as means ± SE.
