139890-66-7 CH 66 CH-66 L-Serinamide, N-(2-((N-(1-(N-(2,2-dimethyl-1-oxopropyl)-L-histidyl)-L-prolyl)-phenylalanyl)amino)-1-hydroxy-4-methylpentyl)-L-leucyl-L-tyrosyl-L-tyrosyl- Piv-his-pro-phe-leu(OH)leu-tyr-tyr-ser-NH2