title: 2-Amino-4,6-dimethyl-pyrimidin-1-ium 1-oxo-2,6,7-trioxa-1λ-phosphabicyclo-[2.2.2]octane-4-carboxyl-ate.
abstract: In the title compound, C(6)H(10)N(3) (+)·C(5)H(6)O(6)P(-), the cation and anion are linked by pairs of N-H⋯O hydrogen bonds. There are additional inter-molecular N-H⋯N hydrogen bonds, which generate centrosymmetric tetramers of two cations and two anions.
authors.affiliation: College of Chemistry and Chemical Engineering, Xuchang University, Xuchang, Henan Province 461000, People's Republic of China.
authors.forename: Xu-Feng
authors.initials: XF
authors.lastname: Hou
authors.forename: Gong-Chun
authors.initials: GC
authors.lastname: Li
authors.forename: Peng-Yang
authors.initials: PY
authors.lastname: Lai