Molecular properties
- Formula
- C5H4N4O
- Molar mass
- 136.11 g·mol−1
- Exact mass
- 136.0385 Da
- 6
- PubChem CID
- 135401907
Molecule record
1,5-dihydropyrazolo[5,4-d]pyrimidin-4-one
C5H4N4O
136.11 g/mol
Loading structure
Functional groups
Aromatic ring
Physical properties
No source-backed physical properties are curated for this molecule yet.
Common names and synonyms
- 1,5-Dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one
- 1H-Pyrazolo[3,4-d]pyrimidin-4-ol
- 315-30-0
- 4-HPP
- 4-Hydroxypyrazolo[3,4-d]pyrimidine
- 4-Hydroxypyrazolopyrimidine
- Adenock
- Allopur
Show all 24 synonyms
- Allopurinol(I)
- Allopurinolum
- Alopurinol
- Aluline
- Bloxanth
- Dabrosin
- Ketobun-A
- Nektrohan
- Suspendol
- Takanarumin
- Urbol
- Uriprim
- Urobenyl
- Xanturat
- Zyloric
- allopurinol
Structure identifiers
- Canonical SMILES
- O=c1[nH]cnc2[nH]ncc12
- Isomeric SMILES
- C1=NNC2=C1C(=O)NC=N2
- InChI
- InChI=1S/C5H4N4O/c10-5-3-1-8-9-4(3)6-2-7-5/h1-2H,(H2,6,7,8,9,10)
- InChIKey
- OFCNXPDARWKPPY-UHFFFAOYSA-N
- PubChem CID
- 135401907
Spectroscopy
Tabs appear only for spectra stored with clear provenance.
No redistributable or simulated spectroscopy record is attached yet.
Simulated NMR
On-demand educational prediction for 1,5-dihydropyrazolo[5,4-d]pyrimidin-4-one; not experimental data.
Simulated EI mass spectrum
On-demand educational fragmentation for 1,5-dihydropyrazolo[5,4-d]pyrimidin-4-one; not experimental data.
Sources
Molecule identity
Retrieved 8/20/2026. Reuse status is summarized by the badge; open the source for full details.