p. 3355 - 3364
(1999)9β,11β-epoxy-17α-hydroxy-17β-(4-(R)-hydroxy-2,2-dioxido-1,2-oxathiolan-4-yl)-16α-methylandrosta-1,4-diene-3-one
17α,21-dihydroxy-9β,11β-oxido-16α-methylpregna-1,4-diene-3,20-dione
2-furancarbonyl chloride
17β-(2,2-dioxido-3,4-dehydro-1,2-oxathiolan-4-yl)-9β,11β-epoxy-17α-hydroxy-16α-methylandrosta-1,4-dien-3-one 17-(2-furoate)