title: Ethane-1,2-diaminium (R)-2-[4-(1-carboxyl-atoeth-oxy)phen-oxy]acetate.
abstract: In the title compound, C(2)H(10)N(2) (2+)·C(11)H(10)O(6) (2-), the two acetate groups of the cation form dihedral angles of 74.2 (4) and 63.9 (5)° with the central benzene ring. In the crystal, N-H⋯O hydrogen bonds link the cations and anions into layers parallel to the ab plane.
authors.affiliation: Engineering Research Center of Pesticides of Heilongjiang University, Heilongjiang University, Harbin 150050, People's Republic of China, and College of Chemistry and Materials Science, Heilongjiang University, Harbin 150080,  People's Republic of China.
authors.forename: Chang-Yue
authors.initials: CY
authors.lastname: Ren
authors.forename: Guang-Feng
authors.initials: GF
authors.lastname: Hou
authors.forename: Ying-Hui
authors.initials: YH
authors.lastname: Yu
authors.forename: Jin-Sheng
authors.initials: JS
authors.lastname: Gao