Compounds of the formula ##STR1## wherein R.sup.1 is a C.sub.10-24 alkyl group, R.sup.2 is a C.sub.1-4 alkyl group or a phenyl-C.sub.1-3 alkyl group and A.sup.+ is a heterocyclic group containing a quaternized nitrogen, and physiologically acceptable salts thereof have platelet activating factor inhibiting activity and are useful in the prevention and treatment of various circulatory diseases or allergic diseases.
化合物的公式为##STR1##其中R.sup.1是C.sub.10-24烷基,R.sup.2是C.sub.1-4烷基或苯基-C.sub.1-3烷基,A.sup.+是含有季
铵氮的杂环基团,以及其生理上可接受的盐具有血小板活化因子抑制活性,并可用于预防和治疗各种循环系统疾病或过敏性疾病。