Disclosed are a thiazole derivative represented by the following formula, a pharmaceutically acceptable salt thereof and leukotriene antagonist containing the same as the active ingredients: ##STR1## wherein R.sub.1 and R.sub.2 each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a lower alkoxycarbonyl group or a substituted or unsubstituted phenyl group or cooperatively represent a tetramethylene group corresponding to a fused cyclohexane ring or a butadienylene group which is unsubstituted or substituted with a halogen atom, a lower alkoxy group, a lower alkoxycarbonyl group or an alkyl group having 1 to 3 carbon atoms corresponding to a fused benzene ring; R.sub.3, R.sub.4, R.sub.5 and R.sub.6 each independently represent a hydrogen atom, a hydroxyl group, a lower alkoxy group, an alkyl group having 1 to 3 carbon atoms or a halogen atom; A represents a linking group having 2 to 4 chain members; B represents a linking group having 2 to 5 chain members; and Q represents a carboxyl group, a lower alkoxy group, a hydroxyl group, an alkoxycarbonyl group having 2 to 6 carbon atoms or a 5-tetrazolyl group.
本发明揭示了以下公式所代表的
噻唑衍
生物,其药学上可接受的盐以及含有其作为活性成分的
白三烯拮抗剂:其中R.sub.1和R.sub.2分别独立表示氢原子、具有1至8个碳原子的烷基基团、较低的烷氧羰基基团或取代或未取代的苯基团,或者合作地表示对应于融合
环己烷环的四亚甲基基团或未取代或取代有卤原子、较低烷氧基、较低烷氧羰基基团或具有1至3个碳原子的烷基基团的丁二亚
乙烯基团;R.sub.3、R.sub.4、R.sub.5和R.sub.6分别独立表示氢原子、羟基、较低烷氧基、具有1至3个碳原子的烷基基团或卤原子;A表示具有2至4个链成员的连接基团;B表示具有2至5个链成员的连接基团;Q表示羧基、较低烷氧基、羟基、具有2至6个碳原子的烷氧羰基基团或5-
四唑基团。