In　the　crystal　structure　of　the　title　coordination　polymer,　{[Zn-2(C24H18N4O10)(H2O)4]center　dot　H2O}(n),　the　molecular　building　block　(MBB),　viz　[Zn-2(CO2)(4)(H2O)(4)],　comprises　two　Zn-II　cations,　each　bridged　by　three　carboxylate　groups　from　different　ligand　molecules.　These　two　Zn-II　cations　exhibit　different　coordination　environments:　a　distorted　trigonal-pyramidal　coordination,　as　an　intermediate,　is　formed　by　the　two　coordinated　water　molecules　and　three　carboxylate　groups,　and　a　distorted　octahedral　geometry　defined　by　three　water　molecules　and　three　carboxylate　groups,　in　which　two　carboxylate　groups　from　the　same　side　of　the　clip　glycoluril　ring　and　one　water　molecule　are　bidentate　bridging,　whereas　others　are　monodentate　units.　Every　ligand　molecule　connects　four　MBBs,　thus　forming　a　three-dimensional　structure.　Extensive　intra-　and　intermolecular　O-H　center　dot　center　dot　center　dot　O　hydrogen　bonding　is　observed.