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. 2021 Mar 22;26(6):1792. doi: 10.3390/molecules26061792

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© 2021 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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Chemical structures of c(RGDfE) peptides with a PEG₆ linker (H₂N-PEG₆-CH₂COOH); monomer [¹⁸F]FBOA-Dpr-HEG-c(RGDfE) 1, dimer [¹⁸F]FBOA-Dpr-K(HEG-c(RGDfE))₂ 2 and tetramer [¹⁸F]FBOA-Dpr-K{K[HEG-(c(RGDfE)]₂}₂ 3 are labeled with N-(4-[¹⁸F]fluorobenzylidene)oxime ([¹⁸F]FBOA) (Dpr = diaminopropionic acid).