The present invention provides compounds of the formula (I):
or salts, esters or amide derivatives thereof, wherein R1 is-CO2H, -CH=CH-C02H, -(CH2)nC02H, or-O-(CH2)nCO2H (n = 1 to 4); R2 is C1-4 alkyl or benzyl which is optionally substituted by a C1-4 alkyl group or groups; R3 is C1-4 alkoxy, C1-4 alkyl or halogen.
Also provided are pharmaceutical formulations containing the compounds of the formula (I) and methods for the preparation of the compounds.
The above mentioned compounds have antihistaminic activity.
本发明提供了式(I)化合物:
或其盐、酯或酰胺衍
生物,其中 R1 是-CO2H、-CH=CH-C02H、-(
CH2)nC02H 或-O-( )nCO2H (n=1 至 4);R2 是任选被一个或多个 C1-4 烷基取代的 C1-4 烷基或苄基;R3 是 C1-4 烷氧基、C1-4 烷基或卤素。
此外,还提供了含有式(I)化合物的药物制剂和化合物的制备方法。
上述化合物具有抗
组胺活性。