(Asp28)-Exenatide is a degradation product of exenatide (HY-13443). (Asp28)-Exenatide can be used as a GLP-1R agonist[1].
References
[1] Schneider EL, et al. A Hydrogel-Microsphere Drug Delivery System That Supports Once-Monthly Administration of a GLP-1 Receptor Agonist. ACS Chem Biol. 2017 Aug 18;12(8):2107-2116. DOI:10.1021/acschembio.7b00218