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Anti-inflammatory activities of rhamnetin and its isoforms. (a) Inhibition of nitric oxide production by flavonoids in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells. (b) Inhibition of interleukin 6 (IL-6) production by flavonoids in LPS-treated RAW 264.7 cells. Data are presented as mean ± SEM from triplicate experiments. ** p < 0.01; *** p < 0.001; and ns, nonsignificant compared to that in the LPS group.
