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The cell viability of (a) HepG2, (b) SMMC-7721, and (c) HL-7702 cells coincubated with 0–2,000 µM of Sa for 24 h, 48 h, and 72 h. All results were exhibited as the means ± SD of five different samples. a–c, A–CBars with different superscript letters differ significantly (P < 0.05) by Duncan's multiple range test.
