申请人:Ciba-Geigy Corporation
公开号:US04968804A1
公开(公告)日:1990-11-06
Compounds of formula I ##STR1## wherein X.sub.1, X.sub.2, X.sub.3, X.sub.4, X.sub.5, X.sub.6, Y, Z and R.sub.1 -R.sub.4 are as defined in the description, have valuable pharmaceutical properties and are especially active against tumours. They are prepared in a manner known per se.
式子I的化合物 ##STR1## 其中X.sub.1、X.sub.2、X.sub.3、X.sub.4、X.sub.5、X.sub.6、Y、Z和R.sub.1-R.sub.4的定义如描述中所述,具有有价值的药物特性,特别是对肿瘤有很强的活性。它们可以按照已知的方法制备。