Nitroimidazolyl-s-triazolo[4,3-b]pyridazines of the formula: ##STR1## wherein R is hydrogen or lower alkyl optionally substituted in the 2-position by hydroxyl or by lower acyloxy or lower alkoxy; A is hydrogen, halogen, azido, cyano; lower alkyl alkoxy, alkylthio, alkylsulfonyl, carboxyl; lower alkoxycarbonyl, lower alkoxycarbonimidoyl; or hydrazino, carbamoyl, amidino or a carboximidohydrazide group optionally substituted by one or two lower acyl, alkyl or cycloalkyl radicals; or A is a radical of the formula: ##STR2## wherein R.sub.1 and R.sub.2 are, individually, hydrogen or a number of organic radicals or, taken together, can be an alkylene bridge; and R.sub.3 is hydrogen or lower alkyl; or, together with R.sub.2, R.sub.3 can form an alkylene bridge; n is 0 or 1; And the pharmaceutically compatible thereof, possess high in vivo effectiveness as antimicrobials.
化合物的式子为:##STR1## 其中R为氢或低级烷基,可选地在2位上被羟基或低级酰氧基或低级烷氧基取代;A为氢、卤素、偶氮、
氰基、低级烷氧基、烷基
硫基、烷基磺酰基、羧基、低级烷氧羰基、低级烷氧羰基
亚胺基、或
氨基甲酰基、酰胺基或羧基
亚胺基,可选地被一个或两个低级酰基、烷基或环烷基基团取代;或A为式子:##STR2## 其中R.sub.1和R.sub.2分别为氢或有机基团,或一起可以是烷基桥;R.sub.3为氢或低级烷基;或者,R.sub.2和R.sub.3一起可以形成烷基桥;n为0或1;以及其药学上相容的物质,具有高的体内抗菌活性。