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. 2023 Jul 24;16(7):1051. doi: 10.3390/ph16071051

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© 2023 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 (https://creativecommons.org/licenses/by/4.0/).

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Scheme of radiosynthesis (A) and radiochemical conversion (RCC) of (B) [¹¹C]1a and (C) [¹¹C]2a at various reaction conditions using [¹¹C]CH₃I and 2 mg/mL precursor without a base. (D) RCC of [¹¹C]2a and [¹¹C]2b at different reaction conditions using [¹¹C]CH₃OTf with or without aqueous TBAH as a base. Standard deviations are represented as error bars (n = 2).