Last reviewed: October 2026 · Cleared Peptides research team
KX-826 is pyrilutamide, CAS 1272719-00-2. Formula C21H15F5N4O2S. It is a nonsteroidal androgen receptor antagonist, structurally distinct from RU58841 and from the steroidal ligand CB-03-01.
| Name | Pyrilutamide |
|---|---|
| Other names | KX-826; KX826 |
| CAS number | 1272719-00-2 |
| PubChem CID | 50940514 |
| Molecular formula | C21H15F5N4O2S |
| Molecular weight | 482.43 g/mol |
| Class | Nonsteroidal androgen receptor antagonist |
| Catalog status | Not a current Cleared Peptides lot. |
Receptor class
The published class is androgen receptor antagonism in receptor-binding work. This guide stops at that class. It does not describe a concentration, a vehicle, or a tissue outcome.
Frequently Asked Questions
Is KX-826 the same as pyrilutamide?
Yes. KX-826 is the development code. The CAS number is 1272719-00-2.
Is it the same as RU58841?
No. Different structures and different CAS numbers.
Is this for human use?
No. Laboratory reference only.
Selected References
Registry records and peer-reviewed literature listed as scientific background. Citation does not imply endorsement, a benefit, or any use.
- PubChem CID 50940514, CAS 1272719-00-2. PubChem 50940514
Research Use Only Notice
This guide is provided for educational and laboratory reference purposes. It summarizes published structural and biochemical literature. It does not describe, recommend, or imply any use in humans or animals. These materials are not drugs, foods, cosmetics, or dietary supplements on this page, are not offered here as a treatment, and no dosing or administration instructions are provided. Cleared Peptides does not currently list a lot for every compound on this page.
