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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 (https://creativecommons.org/licenses/by/4.0/).
Representative radio-HPLC chromatogram (UV channel top, radioactivity channel bottom) spiked with reference compounds for the synthesis of [11C]2a and [11C]2b with RCCs of 53.5% and 19.6% (corrected for decay during HPLC measurement), respectively.