RARECHEM BK PT 0191;(R)-2-TERT-BUTOXYCARBONYLAMINO-3-(4-TERT-BUTYL-PHENYL)-PROPIONIC ACID;N-ALPHA-T-BUTOXYCARBONYL-P-T-BUTYL-D-PHENYLALANINE;N-ALPHA-T-BUTOXYCARBONYL-(4-T-BUTYL)-D-PHENYLALANINE;BOC-4-T-BUTYL-D-PHENYLALANINE;BOC-4-TERT-BUTYL-D-PHENYLALANINE;BOC-4-TERT-BUTYL-D-PHE-OH;BOC-D-PHE(P-TBU)-OH