title: 3,8-Dimethyl-quinazoline-2,4(1H,3H)-dione.
abstract: In the title compound, C(10)H(10)N(2)O(2), all non-H atoms are approximately co-planar with an r.m.s. deviation of 0.016 Å. In the crystal, mol-ecules are linked into inversion dimers by pairs of N-H⋯O hydrogen bonds. Chains along [010] are buiilt up by π-π inter-actions [centroid-centroid distance = 3.602 (1) Å] between the benzene and piperazine rings of adjacent mol-ecules.
authors.affiliation: Key Laboratory of Green Chemical Technology, College of Heilongjiang Province, School of Chemistry and Environmental Engineering, Harbin University of Science and Technology, Harbin 150040,  People's Republic of China.
authors.forename: Wei-Yan
authors.initials: WY
authors.lastname: Qin
authors.forename: Bo
authors.initials: B
authors.lastname: Liu
authors.forename: Cong-Wen
authors.initials: CW
authors.lastname: Duan
authors.forename: Qing-Xiu
authors.initials: QX
authors.lastname: Yin
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677
references.citation: J Agric Food Chem. 2010 Dec 8;58(23):12327-36
references.pmid: 21047132