11076-29-2 35439-81-7 35752-72-8 50894-63-8 56093-49-3 56093-98-2 Ac-Pepstatin Ac-Val-val-4-amino-3-hydroxy-6-Me-heptanoyl-ala-4-amino-3-hydroxyl-6-Me-heptanoic acid Acetyl-pepstatin Acetylvalylvalyl-4-amino-3-hydroxy-6-methylheptanoylalanyl-4-amino-3-hydroxyl-6-methylheptanoic acid L-Valinamide, N-acetyl-L-valyl-N-(4-((2-((1-(2-carboxy-1-hydroxyethyl)-3-methylbutyl)amino)-1-methyl-2-oxoethyl)amino)-2-hydroxy-1-(2-methylpropyl)-4-oxobutyl)-, (1S-(1R*,2R*,4(R*(R*(R*)))))- Streptomyces pepsin inhibitor