Ethyl 3-methyl-4-oxo-4,5-dihydro-1H-pyrrolo[2,3-d]pyridazine-2-carboxyl­ate

The title compound, C10H11N3O3, was synthesized by the reaction of 3,5-bis­(ethoxy­carbon­yl)-2-formyl-4-methyl-1H-pyrrole and hydrazine hydrate. The angle between the pyrrole ring and the pyridazinone ring is 0.93 (9)°. In the crystal, inter­molecular N—H⋯O and N—H⋯N hydrogen-bond inter­actions link the mol­ecules into a two-dimensional network.