N-Boc-2,5-difluoro-D-phenylalanine

(R)-2-TERT-BUTOXYCARBONYLAMINO-3-(2,5-DIFLUORO-PHENYL)-PROPIONIC ACID

(2R)-2-[(TERT-BUTOXYCARBONYL)AMINO]-3-(2,5-DIFLUOROPHENYL)PROPANOIC ACID