Novel xanthine compounds represented by the following formula: ##STR1## wherein each of X.sup.1 and X.sup.2 independently represents oxygen or sulfur; and Q represents; ##STR2## where ----- represents a single bond or a double bond; Y represents a single bond or alkylene, n represents 0 or 1, each of W.sup.1 and W.sup.2 independently represents hydrogen, lower alkyl or amino, Z represents --CH.sub.2 -, --O--, --S-- or --NH--; represents ##STR3## each of R.sup.1 and R.sup.2 independently represents hydrogen, lower alkyl, allyl or propargyl; and R.sup.3 represents hydrogen or lower alkyl, and when Q represents the groups other than ##STR4## each of R.sup.1, R.sup.2 and R.sup.3 independently represents hydrogen or lower alkyl; provided that when Q is ##STR5## then R.sup.1 R.sup.2 and R.sup.3 are not simultaneously methyl; and pharmaceutically acceptable salts thereof have a diuretic effect, a renal-protecting effect and a bronchodilatory effect.
以下是用下列式子表示的新型
黄嘌呤化合物:##STR1## 其中X.sup.1和X.sup.2各自独立地代表氧或
硫; Q代表; ##STR2## 其中-----代表单键或双键;Y代表单键或烷基,n代表0或1,W.sup.1和W.sup.2各自独立地代表氢,低烷基或
氨基,Z代表--CH.sub.2-, --O--, --S--或--NH--;代表 ##STR3## R.sup.1和R.sup.2各自独立地代表氢,低烷基,烯丙基或
丙炔基;而R.sup.3代表氢或低烷基,当Q代表除了##STR4##之外的基团时,R.sup.1,R.sup.2和R.sup.3各自独立地代表氢或低烷基;但是,当Q为##STR5##时,R.sup.1,R.sup.2和R.sup.3不能同时为甲基;以及其药学上可接受的盐具有利尿作用、肾脏保护作用和支气管扩张作用。