(2S)-2-[[(2S,3S)-3-amino-2-hydroxy-4-phenylbutanoyl]amino]-4-methylpentanoic acid (2S)-2-[[(2S,3S)-3-amino-2-hydroxy-4-phenyl-butanoyl]amino]-4-methyl-pentanoic acid (2S)-2-[[(2S,3S)-3-amino-2-hydroxy-1-oxo-4-phenylbutyl]amino]-4-methylpentanoic acid (2S)-2-[[(2S,3S)-3-amino-2-hydroxy-4-phenyl-butanoyl]amino]-4-methyl-valeric acid Lopac-E-0381 Lopac-B-8385 NCGC00015167-01 NCGC00015167-02