title: 2-(3-Oxocyclo-hex-1-enylamino)acetic acid.
abstract: The six-membered ring of the title compound, C(8)H(11)NO(3), adopts an envelope shape with the C atom in the meta position of the carbonyl representing the flap. This atom is disordered over two positions in an 0.865 (6): 0.135 (6) ratio. In the crystal, a two-dimensional supra-molecular network parallel to the ac plane is built up from O-H⋯O and N-H⋯O hydrogen bonds.
authors.affiliation: Key Laboratory of Polyoxometalate Science of the Ministry of Education, Northeast Normal University, Changchun 130024, People's Republic of China.
authors.forename: Li
authors.initials: L
authors.lastname: Liu
authors.forename: Li-Zhen
authors.initials: LZ
authors.lastname: Liu
authors.forename: Xi-Zheng
authors.initials: XZ
authors.lastname: Liu
authors.forename: Bo
authors.initials: B
authors.lastname: Bi
authors.forename: Lin
authors.initials: L
authors.lastname: Xu