121353-87-5 3',3'-Difluoro-3'-deoxythymidine 3'-Deoxy-3',3'-difluorothymidine 3-Fluoro-1-(3'-fluoro-2',3'-dideoxy-beta-D-ribofuranosyl)-5-methyluracil 3-Fluoro-1-(3'-fluoro-3'-deoxy-beta-D-erythropentofuranosyl)thymine F2dT Thymidine, 3'-deoxy-3',3'-difluoro-