英文别名Halcinonide Impurity: 21-chloro, 11β,16α,17α-Trihydroxy-9a-fluoropregn-4-ene-3,20-dione; Halcinonide deprotonation impurity; Pregn-4-ene-3,20-dione, 21-chloro-9-fluoro-11,16,17-trihydroxy-, (11β,16α)-; Pregn-4-ene-3,20-dione, 21-chloro-9-fluoro-11,16,17-trihydroxy-, (11β,16α) 
