The present invention provides an antitumor agent and the like, which comprises as an active ingredient, a pyrimidine derivative represented by Formula (I):
[wherein —X—Y-Z- represents —O—CR
3
═N— (wherein R
3
represents a hydrogen atom, a substituted or unsubstituted aromatic heterocyclic group and the like) and the like, R
1
represents —NR
10
R
11
(wherein R
10
and R
11
may be the same or different, and each represents a hydrogen atom, substituted or unsubstituted lower alkyl and the like) and the like, R
2
represents —NR
13
R
14
(wherein R
13
and R
14
may be the same or different, and each represents a hydrogen atom, substituted or unsubstituted lower alkyl and the like)] or a pharmaceutically acceptable salt thereof.
本发明提供了一种抗肿瘤剂及类似物,其包括一种以
嘧啶衍
生物为活性成分,其表示为式(I):[其中- X-Y-Z-表示-O-CR3═N-(其中R3表示氢原子,取代或未取代的芳香族杂环基等),R1表示-NR10R11(其中R10和R11可以相同或不同,且每个表示氢原子,取代或未取代的较低烷基等),R2表示-NR13R14(其中R13和R14可以相同或不同,且每个表示氢原子,取代或未取代的较低烷基等)]或其药学上可接受的盐。