Halcinonide: C~24~H~32~ClFO~5~. Mw: 454.96. (1) Pregn-4-ene-3,20-dione, 21-chloro-9-fluoro-11-hydroxy-16,17-[(1-methylethylidene)bis(oxy)]-, (11β,16α)-; (2) 21-Chloro-9-fluoro-11β,16α,17-trihydroxypregn-4-ene-3,20-dione cyclic 16,17-acetal with acetone. CAS-3093-35-4 (1973).
![](https://drug-images.s3.filebase.com/halcinonide-1.jpg)