Compounds of formula (I): ##STR1## (wherein n is 0 or 1, R.sup.1 and R.sup.2 are hydrogen or alkyl, one of A.sup.1 and A.sup.2 is --Z--Y and the other is --W--COOH, where W and Z are alkenylene or alkylene and Y is imidazolyl or pyridyl, and the broken lines represent two single bonds or one single bond and one double bond) and their salts, esters and amides have the ability to inhibit the synthesis of thromboxane A.sub.2 and hence are useful in the treatment or prophylaxis of thrombotic conditions. They may be prepared by introducing an imidazolyl or pyridyl group into the corresponding compound in which Y is replaced by an active group or atom.
化合物的
化学式(I):##
STR1##(其中n为0或1,R.sup.1和R.sup.2为
氢或烷基,A.sup.1和A.sup.2中的一个为--Z--Y,另一个为--W--COOH,其中W和Z为
烯烃基或烷基,Y为
咪唑基或
吡啶基,虚线代表两个单键或一个单键和一个双键),以及它们的盐、
酯和
酰胺具有抑制血栓素A.sub.2合成的能力,因此在治疗或预防血栓性疾病方面是有用的。它们可以通过将
咪唑基或
吡啶基引入相应的化合物中来制备,其中Y被活性基团或原子所取代。