The present invention provides thienopyrimidine derivatives of the formula (I) ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and each represent hydrogen, halogen, lower alkyl, cycloalkyl or phenyl, R.sub.1 and R.sub.2 taken together may form a ring of an alkylene chain, R.sub.3 represents lower alkyl or a group of the formula ##STR2## (in which R.sub.4 is a lower alkyl, lower alkoxy or halogen, m is 0, 1 or 2, and R.sub.5 is hydrogen or halogen) and Z is oxygen or sulfur, or pharmaceutically acceptable salts thereof, pharmaceutical compositions containing them as an active principle and aldose-reductase inhibitors.
本发明提供了式(I)的
噻唑嘧啶衍
生物,其中R.sub.1和R.sub.2相同或不同,且分别表示氢、卤素、较低的烷基、环烷基或苯基,R.sub.1和R.sub.2在一起可以形成一个烷基链的环,R.sub.3表示较低的烷基或式子##STR2##的基团(其中R.sub.4为较低的烷基、较低的烷氧基或卤素,m为0、1或2,R.sub.5为氢或卤素),Z为氧或
硫,或其药学上可接受的盐,以及包含它们作为活性原料的药物组成物和醛糖还原酶
抑制剂。