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Cytotoxicity of PFEA and its active compounds on A549 cells. The cells were treated with PFEA (A), luteolin (B), and rosmarinic acid (C) for 24 and 48 h. Cell survival was determined using the MTT assay. Data are presented as mean ± S.D. values of three independent experiments. Data are presented as mean ± S.D. values of three independent experiments.
