BOC-L-PHE(4-NH-AC)

BOC-PHE(4-NHAC)-OH

BOC-S-PHE-(4-NHAC)-OH

BOC-4-(ACETYL-AMINO)-L-PHENYLALANINE

N-ALPHA-T-BUTOXYCARBONYL-4-ACETAMIDO-L-PHENYLALANINE

(S)-N-ALPHA-T-BUTYLOXYCARBONYL-4-ACETYLAMINOPHENYLALANINE