title: 4-Phenyl-1,2,3,4-tetra-hydro-pyrimido[1,2-a]benzimidazol-2-one.
abstract: In the title compound, C(16)H(13)N(3)O, the tetrahydropyrimidin-one ring adopts a sofa conformation. In the crystal structure, mol-ecules are linked by N-H⋯N hydrogen bonds and C-H⋯π inter-actions.
authors.forename: Gong-Chun
authors.initials: GC
authors.lastname: Li
authors.forename: Feng-Ling
authors.initials: FL
authors.lastname: Yang
authors.forename: Chang-Sheng
authors.initials: CS
authors.lastname: Yao