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Viability of BV-2 cells treated at different concentrations for 2 h with Banisteriopsis caapi extract (BC, (A)), the isolated fractions F1 to F5 (B–F), and β-carbolines (G–I). Values are presented as mean ± SEM (n = 3, except for control, n = 6). * p < 0.05, ** p < 0.01, *** p < 0.001 compared to cells with no treatment (control).
