title: 3-{1-[(2,4-Dinitrophenyl)hydrazino]-ethyl-idene}-5-(1-methylpropyl)pyrrolidine-2,4-dione.
abstract: In the title compound, C(16)H(19)N(5)O(6), two intramolecular N-H⋯O hydrogen bonds help to establish the conformation. In the crystal, intermolecular N-H⋯O links result in chains propagating in [010].
authors.affiliation: Bundesanstalt für Materialforschung und -prüfung, Abteilung Analytische Chemie; Referenzmaterialien, Richard-Willstätter-Strasse 11, D-12489 Berlin-Adlershof, Germany.
authors.forename: David
authors.initials: D
authors.lastname: Siegel
authors.forename: Stefan
authors.initials: S
authors.lastname: Merkel
authors.forename: Matthias
authors.initials: M
authors.lastname: Koch
authors.forename: Franziska
authors.initials: F
authors.lastname: Emmerling
authors.forename: Irene
authors.initials: I
authors.lastname: Nehls