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A. rosea flower extracts were not toxic to murine macrophage RAW264.7 cells (A) A. rosea flower water extracts (ARFW) induced the production of NO; (B) The cell viability was determined by MTT assay. ARFW, ARFE and lipopolysaccharide (LPS, 100 ng/mL) showed no cytotoxicity on RAW264.7 cells with 100 μg/mL maximum concentration for 24 h. NO production was induced by ARFW, but not by ARFE. ** p < 0.01, *** p < 0.001 vs. control.
