Amani Direm2024-03-222024-03-222009-11-041600-5368http://dspace.univ-khenchela.dz:4000/handle/123456789/4453The title organic salt, C4H6N3O+ C4H3O4ÿ C4H5N3O, was synthesized from cytosine base and maleic acid. An intramolecular O—H O hydrogen bond occurs in the hydrogen maleate anion. The crystal packing is stabilized by intermolecular N—H O, N—H N and C—H O hydrogen bonds, giving rise to a nearly planar two-dimensional network parallel to (101)enCytosinium–hydrogen maleate–cytosineArticle