Proteasome Inhibitor 1

Also known as: PSI, Proteasome Inhibitor I, Proteasome Inhibitor 1, Z-Ile-Glu(OtBu)-Ala-Leu-aldehyde, Carbobenzoxy-L-isoleucyl-gamma-t-butyl-L-glutamyl-L-alanyl-L-leucinal, Benzyloxycarbonyl-L-isoleucyl-[(2S)-2-amino-4-(t-butyloxycarbonyl)butanoyl]-L-alanyl-L-leucinal, N-CBZ-Ile-Glu(O-t-butyl)-Ala-Leucinal, Z-IE(OtBu)AL-CHO, N-[(Phenylmethoxy)carbonyl]-L-isoleucyl-L-α-glutamyl-tert-butylester-N-[(1S)-1-formyl-3-methylbutyl]-L-alaninamide, tert-Butyl (4S)-4-{[(2S,3S)-2-{[(benzyloxy)carbonyl]amino}-3-methylpentanoyl]amino}-5-{[(2S)-1-{[(2S)-4-methyl-1-oxopentan-2-yl]amino}-1-oxopropan-2-yl]amino}-5-oxopentanoate, 2-Methyl-2-propanyl (4S)-4-{[(2S,3S)-2-{[(benzyloxy)carbonyl]amino}-3-methylpentanoyl]amino}-5-{[(2S)-1-{[(2S)-4-methyl-1-oxo-2-pentanyl]amino}-1-oxo-2-propanyl]amino}-5-oxopentanoate

Proteasome Inhibitor 1 (CAS 158442-41-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C32H50N4O8 and a molecular weight of 618.761 g/mol. Key properties include a boiling point of 844.2±65.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 464.4±34.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

158442-41-2

Jingsj CID

J-1987587-5

Molecular Formula

C₃₂H₅₀N₄O₈

Molecular Weight

618.761 g/mol

Category

Organic Acids

Last updated

8/21/2026