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. 2020 Apr 18;25(8):1872. doi: 10.3390/molecules25081872

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© 2020 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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Scheme 4 — Radiosynthesis of [¹⁸F]AMBF₃Los ([¹⁸F]ammoniomethyltrifluoroborate-losartan) by ¹⁸F-¹⁹F isotopic exchange (IE) reaction.