A pyrido [3,4-d] pyridazine derivative is provided herein of the formula: ##SPC1## Wherein R.sub.1 is hydrogen or an alkyl group of 1 to 4 carbon atoms; R.sub.2 is an alkyl group of 1 to 4 carbon atoms, an aralkyl group of 7 to 8 carbon atoms, or a substituted or unsubstituted phenyl, naphthyl, furyl or pyridyl, the substituent being a lower alkoxy group of 1 to 3 carbon atoms, a lower alkyl group of 1 to 3 carbon atoms, halogen or nitro; R.sub.3 is hydrogen or a lower alkoxy group of 1 to 4 carbon atoms; and R.sub.4 is a substituted or unsubstituted morpholino, piperidino or pyrrolidino, the substituent being methyl or ethyl and a pharmaceutically acceptable salt thereof. The compounds of the present invention have effective and strong diuretic action and exhibit extremely low toxicity characteristics.
本文提供了一种
吡啶并[3,4-d]
吡嗪衍
生物,其
化学式为:##
SPC1##其中R.sub.1是氢或1至4个碳原子的烷基;R.sub.2是1至4个碳原子的烷基,7至8个碳原子的芳基烷基或取代或未取代的苯基,
萘基,
呋喃基或
吡啶基,其取代基为1至3个碳原子的低烷氧基,1至3个碳原子的低烷基,卤素或硝基;R.sub.3是氢或1至4个碳原子的低烷氧基;R.sub.4是取代或未取代的吗啉基,
哌啶基或
吡咯烷基,其取代基为甲基或乙基,以及其药学上可接受的盐。本发明的化合物具有有效和强效的利尿作用,并表现出极低的毒性特性。