Novel 4-(2,1,3-benzoxadiazol-4-yl)-1,4-dihydropyridazines, particularly compounds of the formula I, ##STR1## wherein COOR.sub.1 and COOR.sub.2 are the same or different carboxylic acid ester groups, R.sub.3 is H or (C.sub.1-6)alkyl and R.sub.4 is H, (C.sub.1-6)alkyl, (C.sub.3-6)alkenyl or -alkynyl, (C.sub.3-7)cycloalkyl, (C.sub.4-8)cycloalkylalkyl, (C.sub.7-9)phenylalkyl or (C.sub.9-12) phenylalkenyl, the phenyl ring being unsubstituted or mono-, di- or trisubstituted independently by halogen, OH, (C.sub.1-4)alkyl or -alkoxy, for the treatment of coronary insufficiency, spasms in smooth muscles, hypertension or cerebrovascular insufficiency.
4-(
2,1,3-苯并噻二唑-4-基)-1,4-
二氢吡啶嗪的小说,特别是公式I的化合物,其中COOR.sub.1和COOR.sub.2是相同或不同的
羧酸酯基,R.sub.3是H或(C.sub.1-6)烷基,R.sub.4是H,(C.sub.1-6)烷基,(C.sub.3-6)烯基或-炔基,(C.sub.3-7)环烷基,(C.sub.4-8)环烷基烷基,(C.sub.7-9)苯基烷基或(C.sub.9-12)苯基烯基,苯环未取代或单独或二、三取代的卤素,OH,(C.sub.1-4)烷基或-烷氧基,用于治疗冠状动脉不足,平滑肌痉挛,高血压或脑血管不足。