(3-methyl-1H-pyrrole)-2,4-dicarbamate 4. These ones were cyclized in a alkaline medium to ethyl (2-aryl-5-methyl-3-oxo-2,3-dihydro-7H-pyrrolo[3,2-e][1,2,4]triazin-6-yl)carbamates 6 and tested for their stability. The starting carbamate 4 was prepared by a multistep synthesisfrom diethyl 3-methyl-1H-pyrrole-2,4-dicarboxylate 1.