3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||g·mol−1 119.127|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Pyrazolopyrimidines are a series of isomeric heterocyclic chemical compounds with the molecular formula C6H5N3.  They form the central core of a variety of more complex chemical compounds including some pharmaceuticals and pesticides.
Most of the drugs from this class marketed to date are intended to induce sleep, and are prescribed for people suffering insomnia, however some newer compounds produce anxiolytic effects with relatively little sedation, and are being developed for use as non-sedating anti-anxiety drugs.
- Zaleplon - hypnotic (trade name Sonata)
- Indiplon - hypnotic
- Ocinaplon - anxiolytic
- Lorediplon - hypnotic
As they are not chemically related to the benzodiazepines despite their similar effect, such drugs—as well as the imidazopyridines and cyclopyrrones—are sometimes grouped together and referred to as "nonbenzodiazepines".
- "Note that according to other sources, the structure is different, and the sum formula is C5H4N4: see pyrazolopyrimidine on". ChemSpider. Retrieved 2018-11-07.