148191-60-0 3-Ethoxycarbonyl-6-methylpyrazolo(1,5-a)pyrido(3,4-e)pyrimidin-N(sup 7)-oxide Ethyl 6-methylpyrazolo(1,5-a)pyrido(3,4-e)pyrimidine-3-carboxylate 7-oxide Pyrazolo(1,5-a)pyrido(3,4-e)pyrimidine-3-carboxylic acid, 6-methyl-, ethyl ester, 7-oxide