95034-26-7 L-Phenylalanine, N-(N-(N-(N-(N-(N-(1-(N-L-prolyl-L-histidyl)-L-prolyl)-L-phenylalanyl)-L-histidyl)-L-leucyl)-L-phenylalanyl)-L-valyl)- Pro-his-pro-phe-his-leu-phe-val-phe RI 61 RI-61