9-amino-7-(2-hydroxyphenyl)-5,11-dioxo-7,11-dihydro-5H-pyrazolo(1,2-a)pyrido(2,3-d)pyridazine-8-carboxylate
9-amino-7-(2-hydroxyphenyl)-5,11-dioxo-7,11-dihydro-5h-pyrazolo(1,2-a)pyrido(2,3-d)pyridazine-8-carboxylate