Purine derivatives of the formula ##STR1## wherein R is C.sub.1 -C.sub.6 alkyl and R.sub.1 is ##STR2## and their pharmaceutically acceptable acid addition salts are non-adrenergic bronchodilators.
公式为##STR1##的
嘌呤衍
生物,其中R是C.sub.1-C.sub.6烷基,R.sub.1是##STR2##,以及它们的药学上可接受的酸加盐是非
肾上腺素支气管扩张剂。