title: 9-[4-Hydr-oxy-3-(hydroxy-meth-yl)but-yl]guanine monohydrate.
abstract: In the mol-ecular structure of the title compound, also named penciclovir monohydrate, C(10)H(15)N(5)O(3)·H(2)O, the 4-hydr-oxy-3-hydroxy-methyl-but-1-yl group is connected to guanine through an N atom of the imidazole ring. Water mol-ecules stabilize the mol-ecular packing by forming O-H⋯O hydrogen bonds. A three-dimensional network is generated via inter-molecular N-H⋯N, N-H⋯O, O-H⋯N and O-H⋯O hydrogen bonding.
authors.affiliation: Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education), School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin 541004, People's Republic of China.
authors.forename: Huang
authors.initials: H
authors.lastname: Tang
authors.forename: Feng-Jie
authors.initials: FJ
authors.lastname: Cheng
authors.forename: Nan
authors.initials: N
authors.lastname: Li
authors.forename: Yan-Cheng
authors.initials: YC
authors.lastname: Liu
authors.forename: Zhen-Feng
authors.initials: ZF
authors.lastname: Chen