26305-03-3 AIDS-000247 AIDS000247 Iva-Val-Val-Sta-Ala-Sta-OH N-[(3-Methyl-1-oxobutyl)-L-valyl-L-valyl-4-amino-3-hydroxy-6-methylheptanoyl-L-alanyl]-4-amino-3-hydroxy-6-methylheptanoic acid NSC272671 Pepstatin Pepstatin A Pepstatine