(2R-trans)-2-benzyloxymethyl-4-cyanomethyl-2-(2,4-difluorophenyl)tetrahydrofuran

(4R)-5-benzyloxy-4-(2,4-difluorophenyl)-2-hydroxymethyl-1,4-pentanediol

ethyl (5R-cis)- and (5R-trans)-5-benzyloxymethyl-5-(2,4-difluorophenyl)-2-oxo-3-tetrahydrofurancarboxylate

(2R-cis)-2-benzyloxymethyl-2-(2,4-difluorophenyl)-4-[[(4-methylphenyl)sulfonyloxy]methyl]tetrahydrofuran

(2R-trans)-2-benzyloxymethyl-2-(2,4-difluorophenyl)-4-[[(4-methylphenyl)sulfonyloxy]methyl]tetrahydrofuran