Pepstatin A
胃蛋白酶抑制剂
Also known as: Pepstatin, Isovalerylpepstatin, Iva-Val-Val-Sta-Ala-Sta-OH, N-Isovaleryl-L-valyl-L-valyl-3-hydroxy-6-methyl-γ-aminoheptanoyl-L-alanyl-3-hydroxy-6-methyl-γ-aminoheptanoic acid, Pepstatin (USAN), Procidin S 735A, ahpatinin C
Pepstatin A (CAS 26305-03-3) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C34H63N5O9 and a molecular weight of 685.892 g/mol. It is also known as Pepstatin, Isovalerylpepstatin and Iva-Val-Val-Sta-Ala-Sta-OH. Key properties include a melting point of 233 °C (dec.)(lit.), a boiling point of 997.6±65.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 557.1±34.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 26305-03-3
- Jingsj CID
- J-28113-5
- Molecular Formula
- C34H63N5O9
- Chinese Name
- 胃蛋白酶抑制剂
- Molecular Weight
- 685.892 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 233 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 997.6±65.0 °C at 760 mmHg |
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 557.1±34.3 °C |
| Exact Mass | 685.462585 |
| PSA | 223.26000 |
| LogP | 2.16 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.504 |
| Storage Conditions | 2-8℃ |
| Additional Property | 10% acetic acid in methanol: 1 mg/mL |
Activity & Biological Data
| Target | IC50: 4.5 nM (Hemoglobin-pepsin), 6.2 nM (Hemoglobin-proctase), 150 nM (Casein-pepsin), 260 nM (Hemoglobin-acid protease), 290 nM (Casein-proctase), 520 nM (Casein-acid protease)[1] |
|---|---|
| Additional Information | [1]. Umezawa H, et al. Pepstatin, a new pepsin inhibitor produced by Actinomycetes. J Antibiot (Tokyo). 1970 May;23(5):259-62. [2]. Seelmeier S, et al. Human immunodeficiency virus has an aspartic-type protease that can be inhibited by pepstatin A. Proc Natl Acad Sci U S A. 1988 Sep;85(18):6612-6. |
Frequently Asked Questions
What is the CAS number of Pepstatin A?
The CAS number of Pepstatin A is 26305-03-3.
What are the molecular formula and molecular weight of Pepstatin A?
Pepstatin A has molecular formula C34H63N5O9 and molecular weight 685.892 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Pepstatin A (CAS 26305-03-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-28113-5 (accessed 2026-10-28).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.