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. 2017 Nov 28;16:1536012117737919. doi: 10.1177/1536012117737919

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© The Author(s) 2017

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 2. — Chemical structure of αMSH analogues. (A) Linear αMSH analogue, NDPamide; (B) lactam bridge-based cyclized αMSH analogue, Nle-CycMSH_hex (MTII); (C) metal coordination-based cyclized αMSH analogue, ReCCMSH; and (D) examples of linkers and chelators that enable radiolabeling. αMSH denotes alpha-melanocyte-stimulating hormone.