1. What is MK677 CAS 159752-10-0? Ibutamoren also called MK677, Cas 159752-10-0, is a non-peptide ghrelin receptor agonist and a growth hormone secretagogue that mimics the growth hormone (GH) stimulating effect of the endogenous hormone ghrelin. Ibutamoren mimics the action of Ghrelin, which is the hunger hormone in the body but is also associated with...