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. 2019 Sep 1;11(9):443. doi: 10.3390/pharmaceutics11090443

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© 2019 by the authors.

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/).

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[¹¹C]R116301 (left) and exemplary [¹⁴C]aprepitant (right) structures.