The invention provides compounds of formula (I): ##STR1## or a physiologically acceptable salt, solvate or metabolically labile ester thereof wherein Ar represents the group ##STR2## wherein R.sup.3 represents an acidic group selected from --CO.sub.2 H, --NHSO.sub.2 CF.sub.3 or a C-linked tetrazolyl group; Het represents the group ##STR3## with all other undefined groups being defined in the specification. The compounds may be used in the treatment or prophylaxis of hypertension and diseases associated with cognitive disorders.
本发明提供了化合物的公式(I):##STR1##或其生理上可接受的盐,溶剂或代谢易逐解酯,其中Ar代表基团##STR2##其中R.sup.3代表从--CO.sub.2 H,--NHSO.sub.2 CF.sub.3或C-连接的
四唑基中选择的酸性基团;Het代表基团##STR3##其余未定义的基团在说明书中定义。这些化合物可用于治疗或预防高血压和与认知障碍相关的疾病。