Xanthine compounds.

摘要

Novel xanthine compounds represented by the following formula: <CHEM> wherein each of R<1>, R<2> and R<3> independently represents a hydrogen atom or a lower alkyl group; each of X<1> and X<2> independently represents an oxygen or sulfur atom; <CHEM> represents a single bond or a double bond; Y represents a single bond or an alkylene group, n represents 0 or 1, each of W<1> and W<2> independently represents a hydrogen atom, a lower alkyl or amino group, Z represents -CH2-, -O-, -S- or -NH-residues; provided that when Q is <CHEM> then R<1>, R<2> and R<3> are not simultaneously methyl; and physiologically acceptable salts thereof have a diuretic effect, a renal-protecting effect and/or a bronchodilatory effect. The compounds are useful as a diuretic, a renal-protecting agent and /or bronchodilator.