ethyl (5R-cis)- and (5R-trans)-5-(2,4-difluorophenyl)-2-oxo-5-[(1H-pyrrol-1-yl)methyl]-3-tetrahydrofurancarboxylate

(2R-cis)- and (2R-trans)-2-(2,4-difluorophenyl)-4-[[(4-methylphenyl)sulfonyloxy]methyl]-2-[(1H-pyrrol-1-yl)methyl]tetrahydrofuran

(4R)-4-(2,4-difluorophenyl)-4-hydroxy-2-[[(4-methyl-phenyl)sulfonyloxy]methyl]-5-(1H-pyrrol-1-yl)pentyl 4-methylbenzenesulfonate