title: 5-(Pyridin-4-ylmeth-yl)-1H-pyrazolo-[3,4-d]pyrimidin-4(5H)-one.
abstract: In the title compound, C(11)H(9)N(5)O, the pyrazolo-pyrimidin-4-one ring system is almost planar, with a maximum deviation of 0.0546 (13) Å for the O atom. The crystal packing is stabilized by inter-molecular N-H⋯N, C-H⋯O and C-H⋯N hydrogen bonds. In addition, π-π stacking is found between the pyridine ring and the pyrazolo-pyrimidin-4-one ring systems, with centroid-centroid distances in the range 3.9627 (12)-4.6781 (12) Å.
authors.forename: Abdulsalam
authors.initials: A
authors.lastname: Alsubari
authors.forename: Youssef
authors.initials: Y
authors.lastname: Ramli
authors.forename: El Mokhtar
authors.initials: el M
authors.lastname: Essassi
authors.forename: Hafid
authors.initials: H
authors.lastname: Zouihri
references.citation: Bioorg Med Chem. 2001 Jul;9(7):1895-9
references.pmid: 11425592
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677
references.citation: Acta Crystallogr D Biol Crystallogr. 2009 Feb;65(Pt 2):148-55
references.pmid: 19171970
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2010 Jan 27;66(Pt 2):o454
references.pmid: 21579869