The present invention relates to 1-(2-deoxy-2-fluoro-4-thio-beta-D-arabinofuranosyl)cytosines having excellent antitumor activity, represented by formula [I]: ##STR1## wherein R represents a hydrogen atom or a phosphoric acid residue, and to a process for the production and use thereof.
本发明涉及具有优异的抗肿瘤活性的1-(2-脱氧-2-
氟-4-
硫-β-D-阿拉伯
呋喃糖基)
胞嘧啶,其
化学式为[I]:##STR1##其中R表示氢原子或
磷酸残基,以及其制备和使用的方法。