| 摘要 |
PCT No. PCT/JP95/01385 Sec. 371 Date Feb. 21, 1997 Sec. 102(e) Date Feb. 21, 1997 PCT Filed Jul. 12, 1995 PCT Pub. No. WO96/01834 PCT Pub. Date Jan. 25, 1996The present invention relates to 2'-deoxy-2'-(substituted or unsubstituted)methylidene-4'-thionucleosides having excellent antitumor activity, represented by formula [I]: <IMAGE> [I] wherein B represents a pyrimidine or purine base, R1 and R2, which may be the same or different, represent hydrogen, a cyano group or alkyl group, and R3 represents hydrogen or a phosphoric acid residue, and a method for producing the same, and a use of the same.
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