25 Grams RU58841 Powder ≥99.0% Purity. Packaging: glass bottle. CAS Number: 154992-24-2, Molecular Weight: 369.34, Molecular Formula: C17H18F3N3O3. For research and development use only. Store in a cool, dry place. Store long-term at -20°C. RU58841 is an androgen receptor antagonist or anti-androgen and has a dramatic effect on hair regrowth in controlled studies.