abstract |
The present invention aims to provide an excellent antitumor agent. 1- (2-deoxy-2-fluoro-4-thio-β-D-arabinofuranosyl) cytosine salt is due to: (1) excellent antitumor activity, (2) excellent crystallinity, (3) high solubility in water, (4) no deliquescence, (5) excellent fluidity, (6) excellent chipping properties, (7) manufactured under conditions with little environmental load, or (8) mass-produced, etc. It has at least one of its characteristics and is used as a prodrug of medicine. |