Pharma & Specialty Chemical Standards

Desonide, IUPAC name 9-fluoro-11β,17-dihydroxy-16-methylpregna-1,4-diene-3,20-dione (C23H30O6, molecular weight 402.48 g/mol), is a synthetic glucocorticoid with a pregnane backbone featuring 9-fluoro, 11β-hydroxy, 16-methyl, and 17α-hydroxy substitutions. Its structural rigidity and lipophilicity (logP ~3.2) enhance topical bioavailability. Therapeutically, it treats inflammatory dermatoses via anti-inflammatory and immunosuppressive effects. Mechanistically, Desonide binds glucocorticoid receptors, translocating to the nucleus to modulate gene transcription, suppressing pro-inflammatory cytokines and leukocyte infiltration. Its high potency (10–100x cortisone) stems from the 9-fluoro substitution, enhancing receptor affinity and metabolic stability.