MK-677 Chemical Properties CAS NO. 159752-10-0 MF C27H36N4O5S.CH4O3S MW 624.776 Purity 99% Package Aluminum foil bag and disguised with special way Description MK-677 (also known as ibutamoren), promotes the secretion of the growth hormone (GH) and increases insulin-like growth factor 1 (IGF-1). Ibutamoren increases growth hormone levels by mimicking the action of the hormone ghrelin and binding to one of the ghrelin receptors (GHSR) in the …