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(2007/10/03)(3R,4S)-4-{[(S)-1-((S)-2-tert-Butoxycarbonylamino-3-methyl-butyryl)-pyrrolidine-2-carbonyl]-amino}-2,2-difluoro-3-hydroxy-5-phenyl-pentanoic acid ethyl ester
(3R,4S)-4-Amino-2,2-difluoro-3-hydroxy-5-phenyl-pentanoic acid ethyl ester
ethyl 5-phenyl-4(S)-[(N-tert-butoxycarbonyl)amino]-2,2-difluoro-3(R)-hydroxypentanoate
N-(tert-butyloxycarbonyl)-L-valyl-L-proline
D-phenylalanine benzyl ester