4,4'-disulfanediylbis(dihydrofuran-2-one) 、 16α,17α-(R)-butylidenedioxy-6α,9α-difluoro-11β-hydroxy-3-oxoandrosta-4-ene-17β-carboxylic acid 2-thioxo-2H-pyridin-1-yl ester 以
N,N-二甲基甲酰胺 为溶剂,
生成 16α,17α-(R)-butylidenedioxy-6α,9α-difluoro-11β-hydroxy-17β-(2-oxotetrahydrofuran-4-ylsulfanyl)androst-4-en-3-one