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. 2018 Jan 31;23(2):300. doi: 10.3390/molecules23020300

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© 2018 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 11 — Radiosynthesis of [¹¹C]19 and [¹¹C]20.