D4-Abiraterone is an inhibitor of CYP17A1, 3b-hydroxysteroid dehydrogenase (3βHSD) and steroid 5a-reductase (SRD5A), the main metabolite of abiraterone. D4-Abiraterone is also an antagonist of androgen receptor.
Androgen receptor antagonist 1 is an orally available full androgen receptor antagonist (IC50: 59 nM). It can be used in the synthesis of PROTAC AR degraders, which results in 24% and 47 % AR protein degradation in LNCaP cells at 1 μM and 10 μM, respectively.