Question

Identify the IUPAC of dexamethasone

• A. 2-Chloro-6$\alpha$, 9$\alpha$-difluoro-11$\alpha$, 17, 21-trihydroxy-16$\alpha$-methylpregna-1,4-dien-3, 20-dione
• B. 9$\alpha$-Fluoro-11$\beta$, 17$\alpha$, 21-trihydroxy-16$\beta$-methylpregna-1, 4-diene-3, 20-dione
• C. 22$\alpha$-Fluoro-11$\beta$, 17$\alpha$, 20-trihydroxy-16$\beta$-methylpregna-1, 4-diene-3, 20-dione
• D. 6$\alpha$-Fluoro-11$\alpha$, 21-dihydroxy-16$\alpha$-methylpregna-1, 4-diene-3. 20-dione

Answer 1

Answer: (B)

9$\alpha$-Fluoro-11$\beta$, 17$\alpha$, 21-trihydroxy-16$\beta$-methylpregna-1, 4-diene-3, 20-dione

Answer 2

The correct option is (B) : 9$\alpha$-Fluoro-11$\beta$, 17$\alpha$, 21-trihydroxy-16$\beta$-methylpregna-1, 4-diene-3, 20-dione