A heterocyclic compound containing a five-membered ring with two nitrogen atoms and a ketone group.
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methyl 2-[(2E)-(2-(3,4-dimethoxyphenyl)-3-(2,4,5-trimethoxyphenyl))prop-2-enoyl]hydrazinecarboxylate
3,6-bis-(1-phenylpyrazoline-5-one-3-yl)-piperazine-2,5-dione
3H-Pyrazol-3-one, 4-[[bis(1-methylethyl)amino]dichlorophosphoranylidene]-2,4-dihydro-5- methyl-2-phenyl-