1H-Pyrrole-1-carboxamide, 2,5-dihydro-2,5-dioxo- 2,5-Dioxo-3-pyrroline-1-carboxamide 3-Pyrroline-2,5-dione, 1-carbamoyl- 3-Pyrrolinecarboxamide, 2,5-dioxo- 3345-50-4 NSC58034