title: (E)-4-[2-(2-Hy-droxy-benzo-yl)-hydra-zin-ylidene]penta-noic acid.
abstract: The title mol-ecule, C(12)H(14)N(2)O(4), adopts a trans configuration with respect to the C=N double bond. The amino group is involved in an intra-molecular N-H⋯O hydrogen bond. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into doubled sheets parallel to the (101) plane.
authors: Yanling
authors: Y
authors: Qiao
authors: Jichun
authors: J
authors: Cui
authors: Zhaoling
authors: Z
authors: Pan
authors: Peipei
authors: P
authors: Liu
authors: Handong
authors: H
authors: Yin