Oxadiazolopyrimidine derivatives of the formula ##STR1## wherein R and R.sub.1 are as hereinafter described, prepared, inter alia, by cyclizing a compound of the formula ##STR2## wherein R and R.sub.1 are as hereinafter described. The end products are useful in the treatment of vascular-conditioned hypertension or as vasodilators in the case of peripheral blood supply disorders.
本发明提供了一种式子为##STR1##的Oxadiazolopyrimidine衍
生物,其中R和R.sub.1如下所述,通过环化式为##STR2##的化合物制备而成。所得的最终产物可用于治疗血管条件性高血压或作为外周血液供应障碍的血管扩张剂。