This disclosure describes compounds of the formula ##STR1## wherein R.sub.1 represents hydrogen, fluoro, chloro, lower alkyl having 1 to 4 carbon atoms, or lower alkoxy having 1 to 4 carbon atoms, and R.sub.2 represents lower alkyl or ##STR2## where R.sub.5 represents hydrogen, fluoro, chloro, lower alkyl or lower alkoxy, and R.sub.3 and R.sub.4 each independently represent lower alkyl as defined above, and R.sub.3 and R.sub.4 together with N represent ##STR3## or pharmaceutically acceptable acid addition salts thereof, which are useful as anti-diabetic agents.
本公开说明了以下式子的化合物:##STR1## 其中R.sub.1代表氢、
氟、
氯、1到4个碳原子的低碳基或1到4个碳原子的低碳氧基,R.sub.2代表低碳基或##STR2## 其中R.sub.5代表氢、
氟、
氯、低碳基或低碳氧基,R.sub.3和R.sub.4各自独立地代表如上定义的低碳基,而R.sub.3和R.sub.4与N一起代表##STR3## 或其药学上可接受的酸加盐,其作为抗糖尿病药物具有用途。