Novel xanthine derivatives of the formula (1):
wherein R1, which may be optionally bound through a hetero atom, is a hydrocarbon residue which may be substituted; one of R2 and R3 is a hydrocarbon residue which may be substituted, and the other is hydrogen or a hydrocarbon residue which may be substituted; R4 is hydrogen, halogen or nitro; R5 is a residue capable of forming an anion or a residue convertible into the anion; A is a direct bond or a spacer having atomic length of two or less; n is an integer of 1 or 2; and Y and Z, which may be the same or different, are an oxygen atom or a sulfur atom; and the pharmaceutically acceptable salts thereof have potent angiotensin II antagonist activity and hypotensive activity, thus being useful as therapeutic agents for treating circulatory system diseases such as hypertensive diseases, heart diseases, strokes, etc.
式(1)的新型
黄嘌呤衍
生物:
其中 R1(可选择通过杂原子结合)是可被取代的烃残基;R2 和 R3 中的一个是可被取代的烃残基,另一个是氢或可被取代的烃残基;R4 是氢、卤素或硝基;R5 是可形成阴离子的残基或可转化为阴离子的残基;A 是直接键或原子长度为 2 或更小的间隔键;n 是 1 或 2 的整数;Y 和 Z(可以相同或不同)是氧原子或
硫原子;其药学上可接受的盐具有强效
血管紧张素 II 拮抗剂活性和降血压活性,因此可用作治疗循环系统疾病(如高血压疾病、心脏病、中风等)的治疗剂。