Compounds of formula I ##STR1## wherein Z is thiazolyl or isothiazolyl, and X, R, R.sub.0, R.sub.1, R.sub.2 and R.sub.3 are as defined in the description, have valuable pharmaceutical properties and are effective especially against tumors.
式I的化合物##STR1##其中Z是
噻唑基或
异噻唑基,而X、R、R.sub.0、R.sub.1、R.sub.2和R.sub.3如描述中所定义,具有宝贵的药理特性,特别对抗肿瘤有效。