Novel xanthine compounds represented by the following formula: ##STR1## wherein each of R.sup.1, R.sup.2 and R.sup.3 independently represents hydrogen or lower alkyl; each of X.sup.1 and X.sup.2 independently represents oxygen or sulfur; and Q represents: ##STR2## The compounds are useful as a diuretic, a renal-protecting agent and bronchodilator.
以下式子所代表的新型
黄嘌呤化合物:##STR1## 其中R.sup.1、R.sup.2和R.sup.3各自独立地代表氢或低碳基;X.sup.1和X.sup.2各自独立地代表氧或
硫;Q代表:##STR2## 这些化合物可用作利尿剂、肾保护剂和支气管扩张剂。