(D-Trp(2)-D-phe(5))ghrp 87616-84-0 GH-Releasing hexapeptide 6 GH-Releasing peptide Ghrp, his(1)-lys(6)- Ghrp-6 Growth hormone releasing peptide His(1)-lys(6)-ghrp His-trp-ala-trp-phe-lysnh2 Histidyl-tryptophyl-alanyl-tryptophyl-phenylalanyl-lysinamide L-Lysinamide, L-histidyl-D-tryptophyl-L-alanyl-L-tryptophyl-D-phenylalanyl- SK&F 110679 SK&F-110679 Skf 110679 growth hormone releasing hexapeptide