6-Keto Halcinonide

: 11β,16α,17α-trihydroxy, 21-chloro, 9α-fluoropregn-4-ene-3,6,20-trione 16,17-acetonide; (1S,2S,4R,8S,9S,11S,12R,13S)-8-(2-Chloroacetyl)-12-fluoro-11-hydroxy-6,6,9,13-tetramethyl-5.7-dioxapentacyclo[10.8.0.02,9.04,8.013,18]icos-17-ene-16,19-dione ;