(S)-2-(TERT-BUTOXYCARBONYLAMINO)-3-(4-NITROPHENYL)PROPANOIC ACID;RARECHEM BK PT 0074;N-TBOC-P-NITRO-L-PHENYLALANINE;N-TERT-BUTOXYCARBONYL-4-NITRO-L-PHENYLALANINE;N-BOC-4-NITRO-L-PHENYLALANINE;N-ALPHA-T-BUTOXYCARBONYL-P-NITRO-L-PHENYLALANINE;N-ALPHA-TERT-BUTYLOXYCARBONYL-4-NITRO-L-PHENYLALANINE;N-ALPHA-T-BUTOXYCARBONYL-(4-NITROPHENYL)-L-ALANINE