aqueous perchloric acid 、
6α-fluoro-17α-hydroxy-16β-methyl-3-oxo-androsta-1,4,9(11)-triene-17β-carboxylic acid methyl ester 17-propionate 、
次氯酸叔丁酯 、 ammonium bicarbonate 、 sodium thiosulfate 生成 9α-chloro-6α-fluoro-11β-hydroxy-16β-methyl-3-oxo-17α-propionyloxyandrosta-1,4-diene-17β-carboxylic acid methyl ester