INTERMEDIÁRIO PARA A SÍNTESE DE 1-(2-DESOXI-2-FLUORO-4-TIOBETA-D-ARABINOFURANOSILO)CITOSINA, INTERMEDIÁRIO PARA A SÍNTESE DE TIONUCLEÓSIDO E MÉTODOS PARA A PRODUÇÃO DESTES INTERMEDIÁRIOS
A compound represented by a formula [ID] as shown below (wherein R 1A , R 1B , R 2A , R 2B , R 3A and R 3B represent a hydrogen atom, an optionally substituted C 1-6 alkyl group, and the like) is useful as an intermediate for producing a thionucleoside, and the production method of the present invention is useful as a method for producing a thionucleoside.