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tert-Butyl 1-(bromomethyl)cyclopropyl carbamate Boc-4-Amino-L-phenylalanine BOC-(R)-3-AMINO-4-(4-NITRO-PHENYL)-BUTYRIC ACID 2-TERT-BUTOXYCARBONYLAMINO-3-(4-NITRO-PHENYL)-PROPIONIC ACID Boc-p(NH-Z)-L-Phe-OH BOC-P-AZIDO-PHE-OH (R)-[1-(4-AMINO-PHENYL)-ETHYL]-CARBAMIC ACID TERT-BUTYL ESTER BOC-L-PHE(4-NH-SO2-CH3)