(-)-N-((2S,3R)-3-Amino-2-hydroxy-4-phenylbutyryl)-L-leucine (3-Amino-2-hydroxy-4-phenylbutanoyl)-L-leucine (S-(R*,S*))-N-(3-Amino-2-hydroxy-4-phenylbutyroyl)-L-leucine 3-(R)-Amino-2-(S)-hydroxy-4-phenylbutanoyl-(S)-leucine 58970-76-6 BRN 4704312 Bestatin EINECS 261-529-2 L-Leucine, N-(3-amino-2-hydroxy-1-oxo-4-phenylbutyl)-, (S-(R*,S*))- NK 421 NSC 265489 Ubenimex Ubenimex [INN:JAN] Ubenimexum [Latin]