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. 2019 Feb 12;24(3):644. doi: 10.3390/molecules24030644

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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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Representative UHPLC chromatograms (radiochemical detector) of a ⁶⁸Ga-DOTA-C21 preparation before (A) and after (B) SPE purification. (1) ⁶⁸Ga-free, (2) ⁶⁸Ga-hydrolyzed products, (3) ⁶⁸Ga-labelled byproducts, (4) and (5) ⁶⁸Ga-DOTA-C21 isomers, (6) ⁶⁸Ga-labelled degradation product.