The present invention relates to a novel arylsulfonylimidazolone derivative represented by the following formula (I) which shows a superior antineoplastic activity in contrast to the known sulfonylurea antitumor agents as well as little side effect: ##STR1## and its pharmaceutically acceptable salt and stereoisomer, in which ----, R.sub.1, and R.sub.2 are as defined in the specification.
本发明涉及一种新型芳基磺酰基
咪唑酮衍
生物,其
化学式如下(I),与已知的磺酰
脲类
抗肿瘤药物相比具有更优异的抗肿瘤活性,且副作用小:##STR1## 以及其药学上可接受的盐和立体异构体,其中----,R.sub.1和R.sub.2在说明书中定义。