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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Dose response curves. PC–3, DU–145 and MCF–7 cells were exposed to either 14c (A) or 14d (B) for 48 h, followed by the WST–1 assay to determine cell viability (mean ± SD).