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Effects of arctigenin (ATG) on the human chondrocyte viability. A, Chemical construction of ATG. (B,C), The cytotoxic effect of ATG (0, 5, 10, 50 and 100 μmol/L) on human chondrocytes for 24 and 48 h was assessed using the CCK‐8 assay. Data represented are the means ± standard deviation (S.D). *P < .05, **P < .01, vs ATG (0 μmol/L), n = 5
