The chemical Pepstatin A has a designated molecular formula of C34H63N5O9 and a molecular weight of 685.904 g/mol. Synonyms may include: Pepstatin, Ahpatinin C, BRN 2201362, EINECS 247-600-0, NSC 272671, Pepsin inhibitor S 735A, Pepstatina [INN-Spanish], Pepstatine [INN-French], Pepstatinum [INN-Latin], Procidin S 735A (ChemID). Pepstatin A has been assigned a MeSH pharmacological action of: Protease Inhibitor.