New 8-substituted nucleoside and purine derivatives of the general formula: ##STR1## wherein R represents an amino group or an hydroxy group possibly in the corresponding keto tautomeric form, R.sub.1 is hydrogen or an amino group, R.sub.2 is hydrogen or a .beta.-D-ribofuranosyl radical wherein the primary hydroxy group and/or the two secondary hydroxy groups may be derivatized, R.sub.3 is an optionally substituted aryl or monocyclic heteroaryl radical and, X is --O-- or --S--. The new compounds have antihyperlipaemic activity.
新的8-取代核苷和
嘌呤衍
生物的一般公式为:##
STR1##其中R代表
氨基团或羟基团,可能以相应的
酮式互变形式存在,R.sub.1是
氢或
氨基团,R.sub.2是
氢或一个β-
D-核糖呋喃基团,其中主要羟基和/或两个次要羟基可以被衍生,R.sub.3是一个可选择取代的芳基或单环杂芳基团,X是--O--或--S--。这些新化合物具有抗高脂血症活性。