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. 2018 Feb 21;9:201. doi: 10.3389/fmicb.2018.00201

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Copyright © 2018 Abrão, Alves, Andrade, de Oliveira, Ambrósio, Veneziani, Tavares, Bastos and Martins.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Cell viability of the V79 cell line when exposed to different concentrations of the Copaifera duckei Dwyer oleoresin, (–)-polyalthic acid, and eperu-8(20)-15,18-dioic acid as assessed by the XTT colorimetric method. The values are the mean and standard deviation. *Significantly different from the negative control group (P < 0.05). IC₅₀ values were 777.4 ± 8.3; 127.93 ± 10.97, and 1441.33 ± 13.43 for oleoresin, (–)-polyalthic acid and eperu-8(20)-15,18-dioic acid, respectively.