The invention relates to the compounds of the formula I
wherein the C(=NOH)-NH₂ group may be in tautomeric form; and pharmaceutically acceptable salts thereof, in which:
R₁ is amino or amino which is mono- or disubstituted
X₁ and X₃, independently of one another, are oxygen (-O-) or sulphur (-S-); and
X₂ is a divalent aliphatic hydrocarbon radical which may be interrupted by an aromatic radical;
The compounds are useful, for example, as selective LTB₄ receptor antagonists in the treatment of conditions or syndromes in mammals which are responsive to LTB₄ receptor antagonism. They are prepared in a manner known per se.
本发明涉及式 I 的化合物
其中 C(=NOH)-NH₂ 基团可以是同分异构体形式;及其药学上可接受的盐,其中:
R₁ 是
氨基或单取代或二取代的
氨基
X₁ 和 X₃ 相互独立地是氧(-O-)或
硫(-S-);以及
X₂ 是二价脂族烃基,可被芳香基打断;
这些化合物可作为选择性 LTB₄ 受体拮抗剂,用于治疗哺乳动物体内对 LTB₄ 受体拮抗剂有反应的病症或综合征。它们的制备方法本身是已知的。