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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/).
Selectivity of target derivatives against MCF-7 and MDA-MBA-231 cells. The greater the S1 value (dark blue), the greater the selectivity toward MDA-MBA-231; whereas the greater the S2 value (light blue), the greater the selectivity toward MCF-7.