AOD-9604 (Advanced Obesity Drug 9604) was developed to isolate the fat-burning (lipolytic) properties of endogenous human growth hormone from its somatogenic, diabetogenic, and proliferative actions. By cyclizing the 177-191 sequence with an added tyrosine residue at the N-terminus, it stabilizes the conformation required for beta-3 adrenergic and lipolytic pathway activation without binding the primary growth hormone receptor.
