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(A) Dose-dependent effect of curcumin and ethanolic extracts of P. imperiale in different concentrations (1, 10, 25, 50, 100 µg/mL) for 24 h at 37 °C on MCF-7 cell viability determined by MTT assay. Data shown represent the averages ± SD of three independent experiments. (B) Time-dependent effect of ethanolic extracts from the leaves, flowers and wood extract of P. imperiale. Data shown represent the means ± SD (n = 9).
