title: Deacetyl- tenuazonic acid.
abstract: The heterocycle in the title compound {systematic name: (5S)-5-[(1S)-1-methyl-prop-yl]pyrrolidine-2,4-dione}, C(8)H(13)NO(2), is planar (r.m.s. deviation for all non-H atoms = 0.008 Å). The crystal structure is stabilized by N-H⋯O hydrogen bonding.
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: 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