title: 3-Hydr-oxy-7,8-dimethoxy-quinolin-2(1H)-one.
abstract: In the crystal structure of the title compound, C(11)H(11)NO(4), intra-molecular O-H⋯O hydrogen bonding results in the formation of a planar five-membered ring, which is nearly coplanar with the quinoline group. Inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric dimers.
authors.forename: Jian
authors.initials: J
authors.lastname: Song
authors.forename: Yongcheng
authors.initials: Y
authors.lastname: Lin
authors.forename: Wing Lai
authors.initials: WL
authors.lastname: Chan