(S)-2-[(S)-4-[(R)-2-Acetylamino-3-(4-fluoro-phenyl)-propionyl]-3-(3-amino-propyl)-2-oxo-piperazin-1-yl]-N-methyl-3-naphthalen-2-yl-propionamide

(S)-2-[(R)-2-[(S)-2-(3-Benzyloxycarbonylamino-propyl)-4-((S)-1-methylcarbamoyl-2-naphthalen-2-yl-ethyl)-3-oxo-piperazin-1-yl]-1-(4-fluoro-benzyl)-2-oxo-ethylcarbamoyl]-piperidine-1-carboxylic acid tert-butyl ester