This invention relates to compounds of the formula (I): ##STR1## in which: R is selected from hydrogen and C.sub.1-6 alkyl and R' is selected from hydrogen and C.sub.1-6 alkyl; and their pharmaceutically acceptable acid addition salts. Said compounds are therapeutically useful for the treatment of circulatory insufficiencies.
本发明涉及式(I)的化合物:##
STR1## 其中:R从
氢和C.sub.1-6烷基中选择,R'从
氢和C.sub.1-6烷基中选择;以及它们的药学上可接受的酸加盐。所述化合物在治疗循环不足方面具有治疗用途。