An imidazothiazole compound having the formula (A): ##STR1## wherein R.sub.1 is a phenyl or napthyl which may have a substituent, R.sub.2 is an acyl, and the two bonds at dotted line portions may or may not exist simultaneously, or a pharmacologically acceptable salt thereof and an agent for overcoming resistance to an anti-neoplastic agent or an enhancer for the effect of an anti-neoplastic agent comprising said compound or a pharmacologically acceptable salt thereof as an active ingredient.
一种具有以下结构式(A)的
咪唑噻唑化合物:其中R.sub.1是苯或
萘基,可能带有取代基;R.sub.2是酰基;虚线部分的两个键可以同时存在也可以不存在;或者其药理学上可接受的盐,以及克服
抗肿瘤药物的耐药性或增强
抗肿瘤药物效果的药剂,包括所述化合物或其药理学上可接受的盐作为活性成分。