6-fluoro-17α-hydroxy-16-methylene-9β,10α-pregna-4,6-diene-3,20-dione 、
[3H]acetic anhydride 生成 [(8R,9R,10S,13S,14S,17R)-17-acetyl-6-fluoro-10,13-dimethyl-16-methylidene-3-oxo-1,2,8,9,11,12,14,15-octahydrocyclopenta[a]phenanthren-17-yl] 2-tritioacetate