The present invention relates to 2'-deoxy-2'-(substituted or unsubstituted)methylidene-4'-thionucleosides having excellent antitumor activity, represented by formula [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.
本发明涉及具有优异抗肿瘤活性的2'-脱氧-2'-(取代或未取代)亚甲基-4'-
硫代核苷,由式[I]表示:
其中 B 代表
嘧啶或
嘌呤基,R1 和 R2(可以相同或不同)代表氢、
氰基或烷基,R3 代表氢或
磷酸残基,以及生产方法和用途。