Streptomyces pepsin inhibitor acetyl pepstatin|acetyl-pepstatin N-Acetyl-L-Val-L-Val-[(3S,4S)-4-amino*-3-hydroxy-6-methylheptanoyl]-L-Ala-[(1S)-1-[(1S)-2-carboxy-1-hydroxyethyl]-3-methylbutyl]NH2 N-Ac-L-Val-L-Val-Sta-L-Ala-Sta-OH Pepstatin AC Acetylvalylvalyl-4-amino-3-hydroxy-6-methylheptanoylalanyl-4-amino-3-hydroxyl-6-methylheptanoic acid Ac-Val-val-4-amino-3-hydroxy-6-me-heptanoyl-Ala-4-amino-3-hydroxyl-6-me-heptanoic acid L-Alaninamide, N-acetyl-L-valyl-L-valyl-(3S,4S)-4-amino-3-hydroxy-6-methylheptanoyl-N-[(1S)-1-[(1S)-2-carboxy-1-hydroxyethyl]-3-methylbutyl]- (9ci)