title: Methyl (E)-N'-[1-(2,4-dihydroxy-phen-yl)ethyl-idene]hydrazinecarboxyl-ate.
abstract: The mol-ecule of the title compound, C(10)H(12)N(2)O(4), adopts a trans configuration with respect to the C=N bond. The dihedral angle between the benzene ring and the methyl hydrazinecarboxyl-ate plane is 3.01 (6)°. An intra-molecular O-H⋯N hydrogen bond is observed. In the crystal, mol-ecules are linked into a two-dimensional network parallel to (10) by O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds.
authors.forename: Lu-Ping
authors.initials: LP
authors.lastname: Lv
authors.forename: Wei-Wei
authors.initials: WW
authors.lastname: Li
authors.forename: Wen-Bo
authors.initials: WB
authors.lastname: Yu
authors.forename: Tie-Ming
authors.initials: TM
authors.lastname: Yu
authors.forename: Xian-Chao
authors.initials: XC
authors.lastname: Hu