Last reviewed: October 2026 · Cleared Peptides research team
CB-03-01 is clascoterone, also named cortexolone 17α-propionate. CAS 19608-29-8. The systematic name on the public substance record is 21-hydroxy-3,20-dioxopregn-4-en-17-yl propanoate. It is a steroidal androgen receptor antagonist, unlike the nonsteroidal ligands RU58841 and KX-826.
| Name | Clascoterone |
|---|---|
| Other names | CB-03-01; cortexolone 17α-propionate |
| CAS number | 19608-29-8 |
| PubChem CID | 11750009 |
| Molecular formula | C24H34O5 |
| Class | Steroidal androgen receptor antagonist |
| Catalog status | Not a current Cleared Peptides lot. |
Receptor class
The ester at the steroid core is what distinguishes this molecule from cortexolone itself. Receptor class in the public record is androgen receptor antagonism. No strength, cream, or schedule is stated here.
Frequently Asked Questions
Is CB-03-01 clascoterone?
Yes. CB-03-01 is the development code. CAS 19608-29-8.
Is it a peptide?
No. It is a steroid ester.
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.
- FDA substance record and PubChem CID 11750009, CAS 19608-29-8. PubChem 11750009
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.
