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2D Structure
Also known as:
Molecular Formula
C5H4N4O
Molecular Weight
136.11  g/mol
InChI Key
OFCNXPDARWKPPY-UHFFFAOYSA-N

1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
1,2-dihydropyrazolo[3,4-d]pyrimidin-4-one
2.1.2 InChI
InChI=1S/C5H4N4O/c10-5-3-1-8-9-4(3)6-2-7-5/h1-2H,(H2,6,7,8,9,10)
2.1.3 InChI Key
OFCNXPDARWKPPY-UHFFFAOYSA-N
2.1.4 Canonical SMILES
C1=C2C(=NC=NC2=O)NN1
2.1.5 Isomeric SMILES
C1=C2C(=NC=NC2=O)NN1
2.2 Create Date
2005-03-25
3 Chemical and Physical Properties
Molecular Weight 136.11 g/mol
Molecular Formula C5H4N4O
XLogP3-0.5
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count2
Rotatable Bond Count0
Exact Mass136.03851076 g/mol
Monoisotopic Mass136.03851076 g/mol
Topological Polar Surface Area65.8 A^2
Heavy Atom Count10
Formal Charge0
Complexity275
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently Bonded Unit Count1
4 Drug and Medication Information
4.1 Drug Information
1 of 10  
Drug NameAllopurinol
PubMed HealthAllopurinol
Drug ClassesAntigout, Urinary Stone Agent
Drug LabelAllopurinol is known chemically as 1,5-Dihydro-4H-pyrazolo[3,4-d ]pyrimidin-4-one. It is a xanthine oxidase inhibitor which is administered orally. Its solubility in water at 37C is 80 mg/dL and is greater in an alkaline solution. Allopurinol Table...
Active IngredientAllopurinol
Dosage FormTablet
RouteOral
Strength300mg; 100mg
Market StatusPrescription
CompanyWatson Labs; Vintage Pharms; Ipca Labs; Mutual Pharm; Apotex; Accord Hlthcare; Sun Pharm Inds; Northstar Hlthcare; Mylan

2 of 10  
Drug NameAllopurinol sodium
PubMed HealthAllopurinol (Injection)
Drug ClassesAntigout, Urinary Stone Agent
Drug LabelALOPRIM (allopurinol sodium) for Injection is the brand name for allopurinol, a xanthine oxidase inhibitor. ALOPRIM (allopurinol sodium) for Injection is a sterile solution for intravenous infusion only. It is available in vials as the sterile lyophi...
Active IngredientAllopurinol sodium
Dosage FormInjectable
RouteInjection
Strengtheq 500mg base/vial
Market StatusPrescription
CompanyEurohlth Intl

3 of 10  
Drug NameAloprim
PubMed HealthAllopurinol
Drug ClassesAntigout, Urinary Stone Agent
Drug LabelZYLOPRIM (allopurinol) has the following structural formula:ZYLOPRIM is known chemically as 1,5-dihydro-4H-pyrazolo [3,4-d]pyrimidin-4-one. It is a xanthine oxidase inhibitor which is administered orally. Each scored white tablet contains 100 mg allo...
Active IngredientAllopurinol sodium
Dosage FormInjectable
RouteInjection
Strengtheq 500mg base/vial
Market StatusPrescription
CompanyMylan Institutional

4 of 10  
Drug NameLopurin
Active IngredientAllopurinol
Dosage FormTablet
RouteOral
Strength300mg; 100mg
Market StatusPrescription
CompanyDr Reddys La

5 of 10  
Drug NameZyloprim
Active IngredientAllopurinol
Dosage FormTablet
RouteOral
Strength300mg; 100mg
Market StatusPrescription
CompanyPrometheus Labs

6 of 10  
Drug NameAllopurinol
PubMed HealthAllopurinol
Drug ClassesAntigout, Urinary Stone Agent
Drug LabelAllopurinol is known chemically as 1,5-Dihydro-4H-pyrazolo[3,4-d ]pyrimidin-4-one. It is a xanthine oxidase inhibitor which is administered orally. Its solubility in water at 37C is 80 mg/dL and is greater in an alkaline solution. Allopurinol Table...
Active IngredientAllopurinol
Dosage FormTablet
RouteOral
Strength300mg; 100mg
Market StatusPrescription
CompanyWatson Labs; Vintage Pharms; Ipca Labs; Mutual Pharm; Apotex; Accord Hlthcare; Sun Pharm Inds; Northstar Hlthcare; Mylan

7 of 10  
Drug NameAllopurinol sodium
PubMed HealthAllopurinol (Injection)
Drug ClassesAntigout, Urinary Stone Agent
Drug LabelALOPRIM (allopurinol sodium) for Injection is the brand name for allopurinol, a xanthine oxidase inhibitor. ALOPRIM (allopurinol sodium) for Injection is a sterile solution for intravenous infusion only. It is available in vials as the sterile lyophi...
Active IngredientAllopurinol sodium
Dosage FormInjectable
RouteInjection
Strengtheq 500mg base/vial
Market StatusPrescription
CompanyEurohlth Intl

8 of 10  
Drug NameAloprim
PubMed HealthAllopurinol
Drug ClassesAntigout, Urinary Stone Agent
Drug LabelZYLOPRIM (allopurinol) has the following structural formula:ZYLOPRIM is known chemically as 1,5-dihydro-4H-pyrazolo [3,4-d]pyrimidin-4-one. It is a xanthine oxidase inhibitor which is administered orally. Each scored white tablet contains 100 mg allo...
Active IngredientAllopurinol sodium
Dosage FormInjectable
RouteInjection
Strengtheq 500mg base/vial
Market StatusPrescription
CompanyMylan Institutional

9 of 10  
Drug NameLopurin
Active IngredientAllopurinol
Dosage FormTablet
RouteOral
Strength300mg; 100mg
Market StatusPrescription
CompanyDr Reddys La

10 of 10  
Drug NameZyloprim
Active IngredientAllopurinol
Dosage FormTablet
RouteOral
Strength300mg; 100mg
Market StatusPrescription
CompanyPrometheus Labs