. . "Morphiceptin" . . . . . . "Tyr-Pro-Phe-Pro-NH2, PLO17" . . . . . . . . . . . "morphiceptin" . . . "(2S)-1-[(2S)-2-amino-3-(4-hydroxyphenyl)propanoyl]-N-[(2S)-1-[(2S)-2-carbamoylpyrrolidin-1-yl]-1-oxo-3-phenylpropan-2-yl]pyrrolidine-2-carboxamide" . "Morphiceptin" . . .