Table 1.

Structures of various melanocortin-4 receptor (MC4R) agonists evaluated in human clinical studies.

Setmelanotide:	Ac-Arg-cyclo(Cys-D-Ala-His-D-Phe-Arg-Trp-Cys)-amide
LY2112688:	Ac-D-Arg-cyclo(Cys-Glu-His-D-Phe-Arg-Trp-Cys)-amide
MC4-NN-0453:
MK-0493:
AZD2820:	Structure undisclosed