1189350-60-4

(Pyr1)-Opiorphin Pyr-Arg-Phe-Ser-Arg-OH 5-Oxo-L-prolyl-L-arginyl-L-phenylalanyl-L-seryl-L-arginine L-Arginine, 5-oxo-L-prolyl-L-arginyl-L-phenylalanyl-L-seryl- ((S)-5-oxopyrrolidine-2-carbonyl)-L-arginyl-L-phenylalanyl-L-seryl-L-arginine (Pyr 1)-Opiorphin trifluoroacetate salt Pyr-Arg-Phe-Ser-Arg-OH trifluoroacetate salt