The chemical Calpain Inhibitor I has a designated molecular formula of C20H37N3O4 and a molecular weight of 383.533 g/mol. Synonyms may include: Acetylleucyl-leucyl-norleucinal, N-Acetyl-leucyl-leucyl-norleucinal, Ac-Leu-leu-nle-al, N-Ac-Leu-leu-norleucinal, Allnal, Cpi(1), N-Acetyl-L-leucyl-N-((1S)-1-formylpentyl)-L-leucinamide, Acetyl-leucyl-leucyl-norleucine-aldehyde (ChemID). Calpain Inhibitor I has been assigned a MeSH pharmacological action of: Cysteine Proteinase Inhibitor.