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2D Structure
Also known as: 139110-80-8, Relenza, 4-guanidino-neu5ac2en, Gana, Zanamavir, Gg167
Molecular Formula
C12H20N4O7
Molecular Weight
332.31  g/mol
InChI Key
ARAIBEBZBOPLMB-UFGQHTETSA-N
FDA UNII
L6O3XI777I

A guanido-neuraminic acid that is used to inhibit NEURAMINIDASE.
Zanamivir is a Neuraminidase Inhibitor. The mechanism of action of zanamivir is as a Neuraminidase Inhibitor.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
(2R,3R,4S)-3-acetamido-4-(diaminomethylideneamino)-2-[(1R,2R)-1,2,3-trihydroxypropyl]-3,4-dihydro-2H-pyran-6-carboxylic acid
2.1.2 InChI
InChI=1S/C12H20N4O7/c1-4(18)15-8-5(16-12(13)14)2-7(11(21)22)23-10(8)9(20)6(19)3-17/h2,5-6,8-10,17,19-20H,3H2,1H3,(H,15,18)(H,21,22)(H4,13,14,16)/t5-,6+,8+,9+,10+/m0/s1
2.1.3 InChI Key
ARAIBEBZBOPLMB-UFGQHTETSA-N
2.1.4 Canonical SMILES
CC(=O)NC1C(C=C(OC1C(C(CO)O)O)C(=O)O)N=C(N)N
2.1.5 Isomeric SMILES
CC(=O)N[C@@H]1[C@H](C=C(O[C@H]1[C@@H]([C@@H](CO)O)O)C(=O)O)N=C(N)N
2.2 Other Identifiers
2.2.1 UNII
L6O3XI777I
2.3 Synonyms
2.3.1 MeSH Synonyms

1. 2,3-didehydro-2,4-dideoxy-4-guanidino-n-acetyl-d-neuraminic Acid

2. 2,3-didehydro-2,4-dideoxy-4-guanidinyl-n-acetylneuraminic Acid

3. 4 Guanidino 2 Deoxy 2,3 Didehydro N Acetylneuraminic Acid

4. 4 Guanidino Neu5ac2en

5. 4-guanidino-2,4-dideoxy-2,3-didehydro-n-acetylneuraminic Acid

6. 4-guanidino-2-deoxy-2,3-didehydro-n-acetylneuraminic Acid

7. 4-guanidino-neu5ac2en

8. 5-acetylamino-2,6-anhydro-4-guanidino-3,4,5-trideoxy-d-galacto-non-enoic Acid

9. Acid, 4-guanidino-2-deoxy-2,3-didehydro-n-acetylneuraminic

10. Gg 167

11. Gg-167

12. Gg167

13. Relenza

2.3.2 Depositor-Supplied Synonyms

1. 139110-80-8

2. Relenza

3. 4-guanidino-neu5ac2en

4. Gana

5. Zanamavir

6. Gg167

7. Gg-167

8. Gr 121167x

9. Gr-121167x

10. 4-guanidino-2,4-dideoxy-2,3-dehydro-n-acetylneuraminic Acid

11. Zanamivir (relenza)

12. Relenza (tn)

13. 5-acetamido-2,6-anhydro-3,4,5-trideoxy-4-guanidino-d-glycero-d-galacto-non-2-enonic Acid

14. Chembl222813

15. L6o3xi777i

16. (2r,3r,4s)-3-acetamido-4-(diaminomethylideneamino)-2-[(1r,2r)-1,2,3-trihydroxypropyl]-3,4-dihydro-2h-pyran-6-carboxylic Acid

17. Zmr

18. Chebi:50663

19. 139110-80-8 (free Base)

20. Modified Sialic Acid

21. Gr-121167

22. Dsstox_cid_3749

23. Zanamivirhydrate

24. Dsstox_rid_77184

25. Dsstox_gsid_23749

26. 5-(acetylamino)-2,6-anhydro-4-carbamimidamido-3,4,5-trideoxy-d-glycero-d-galacto-non-2-enonic Acid

27. Gg 167

28. (2r,3r,4s)-3-(acetylamino)-4-carbamimidamido-2-[(1r,2r)-1,2,3-trihydroxypropyl]-3,4-dihydro-2h-pyran-6-carboxylic Acid

29. Gana (inhibitor)

30. Cas-139110-80-8

31. 4-guanidino-neueac2en

32. Unii-l6o3xi777i

33. Zanamivi

34. Zanamivir [usan:inn:ban]

35. Hsdb 7437

36. 2qwe

37. Ncgc00164561-01

38. (2r,3r,4s)-3-acetamido-4-guanidino-2-((1r,2r)-1,2,3-trihydroxypropyl)-3,4-dihydro-2h-pyran-6-carboxylic Acid

39. (2r,3r,4s)-3-acetamido-4-guanidino-2-[(1r,2r)-1,2,3-trihydroxypropyl]-3,4-dihydro-2h-pyran-6-carboxylic Acid

40. D-glycero-d-galacto-non-2-enonic Acid, 5-(acetylamino)-4-((aminoiminomethyl)amino)-2,6-anhydro-3,4,5-trideoxy-

41. D-glycero-d-galacto-non-2-enonic Acid, 5-(acetylamino)-4-[(aminoiminomethyl)amino]-2,6-anhydro-3,4,5-trideoxy-

42. Zanamivir (hydrate)

43. Gr121167x

44. Mfcd00866966

45. 1a4g

46. Zanamivir (usp/inn)

47. Zanamivir [inn]

48. Zanamivir [mi]

49. Zanamivir [hsdb]

50. Zanamivir [usan]

51. Zanamivir [vandf]

52. Zanamivir [mart.]

53. Schembl9501

54. Zanamivir [usp-rs]

55. Zanamivir [who-dd]

56. Gna

57. Bidd:gt0349

58. Bdbm4934

59. Zanamivir [orange Book]

60. Dtxsid0023749

61. Zanamivir, >=98% (hplc)

62. Zanamivir [usp Monograph]

63. Zinc3918138

64. Tox21_112190

65. Bdbm50330326

66. S3007

67. Akos015841013

68. Akos015994539

69. Tox21_112190_1

70. Bs-1017

71. Ccg-267828

72. Cs-0631

73. Db00558

74. Ncgc00164561-02

75. Ncgc00164561-08

76. Ncgc00164561-11

77. (2r,3r,4s)-3-acetamido-4-((diaminomethylene)amino)-2-((1r,2r)-1,2,3-trihydroxypropyl)-3,4-dihydro-2h-pyran-6-carboxylic Acid

78. 5-(acetylamino)-4-{[amino(imino)methyl]amino}-2,6-anhydro-3,4,5-trideoxy-d-glycero-d-galacto-non-2-enonic Acid

79. Hy-13210

80. Z0023

81. C08095

82. C72554

83. D00902

84. Ab01566897_01

85. 110z808

86. A807485

87. Q146075

88. Q-201942

89. Zanamivir, United States Pharmacopeia (usp) Reference Standard

90. Zanamivir For Assay, Europepharmacopoeia (ep) Reference Standard

91. Zanamivir For System Suitability, European Pharmacopoeia (ep) Reference Standard

92. (2r,3r,4s)-4-[(diaminomethylidene)amino]-3-acetamido-2-[(1r,2r)-1,2,3-trihydroxypropyl]-3,4-dihydro-2h-pyran-6-carboxylic Acid

93. (2r,3r,4s)-4-[(diaminomethylidene)amino]-3-acetamido-2-[(1r,2r)-1,2,3-trihydroxypropyl]-3,4-dihydro-2h-pyran-6-carboxylic Acid Hydrate

94. (2r,3r,4s)-4-carbamimidamido-3-acetamido-2-[(1r,2r)-1,2,3-trihydroxypropyl]-3,4-dihydro-2h-pyran-6-carboxylic Acid

95. (4s,5r,6r)-5-acetamido-4-(diaminomethyleneamino)-6-((1r,2r)-1,2,3-trihydroxypropyl)-5,6-dihydro-4h-pyran-2-carboxylic Acid

96. (4s,5r,6r)-5-acetylamino-4-guanidino-6-((1r,2r)-1,2,3-trihydroxy-propy)-5,6-dihydro-4h-pyran-2-carboxylic Acid

97. (4s,5r,6r)-5-acetylamino-4-guanidino-6-((1r,2r)-1,2,3-trihydroxy-propyl)-5,6-dihydro-4h-pyran-2-carboxylic Acid

98. (4s,5r,6r)-5-acetylamino-4-guanidino-6-((1r,3r)-1,2,3-trihydroxy-propyl)-5,6-dihydro-4h-pyran-2-carboxylic Acid

99. (4s,5r,6r)-5-acetylamino-4-guanidino-6-((r)-1,2,3-trihydroxy-propyl)-5,6-dihydro-4h-pyran-2-carboxylic Acid

100. (4s,5r,6r)-5-acetylamino-4-guanidino-6-(1,2,3-trihydroxy-propyl)-5,6-dihydro-4h-pyran-2-carboxylic Acid

101. 4-diaminomethylamino-3-methylcarboxamido-2-(1,2,3-trihydroxypropyl)-(3r)-3,4-dihydro-2h-6-pyrancarboxylic Acid(zanamivir)

102. 4-guanidino-2-deoxy-2,3-dehydro-n-acetyl-neuraminic Acid; 4-guanidino-neu5ac2en; Modified Sialic Acid

103. 5-acetamido-2,6-anhydro-4-carbamimidamido-3,4,5-trideoxy-d-glycero-d-galacto-non-2-enonic Acid

104. 5-acetylamino-4-guanidino-6-(1,2,3-trihydroxy-propyl)-5,6-dihydro-4h-pyran-2-carboxylic Acid

105. 5-acetylamino-4-guanidino-6-(1,2,3-trihydroxy-propyl)-5,6-dihydro-4h-pyran-2-carboxylic Acid(zanamivir)

106. 5-formylamino-4-guanidino-6-(1,2,3-trihydroxy-propyl)-5,6-dihydro-4h-pyran-2-carboxylic Acid

107. D-glycero-d-galacto-non-2-enonic Acid, 5-(acetylamino)-4-(aminoiminomethyl)amino)-2,6-anhydro-3,4,5-trideoxy-

2.4 Create Date
2005-06-24
3 Chemical and Physical Properties
Molecular Weight 332.31 g/mol
Molecular Formula C12H20N4O7
XLogP3-3.2
Hydrogen Bond Donor Count7
Hydrogen Bond Acceptor Count8
Rotatable Bond Count6
Exact Mass332.13319899 g/mol
Monoisotopic Mass332.13319899 g/mol
Topological Polar Surface Area201 Ų
Heavy Atom Count23
Formal Charge0
Complexity518
Isotope Atom Count0
Defined Atom Stereocenter Count5
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 2  
Drug NameRelenza
PubMed HealthZanamivir (By breathing)
Drug ClassesAntiviral
Drug LabelThe active component of RELENZA is zanamivir. The chemical name of zanamivir is 5-(acetylamino)-4-[(aminoiminomethyl)-amino]-2,6-anhydro-3,4,5-trideoxy-D-glycero-D-galacto-non-2-enonic acid. It has a molecular formula of C12H20N4O7 and a molecular we...
Active IngredientZanamivir
Dosage FormPowder
RouteInhalation
Strength5mg
Market StatusPrescription
CompanyGlaxosmithkline

2 of 2  
Drug NameRelenza
PubMed HealthZanamivir (By breathing)
Drug ClassesAntiviral
Drug LabelThe active component of RELENZA is zanamivir. The chemical name of zanamivir is 5-(acetylamino)-4-[(aminoiminomethyl)-amino]-2,6-anhydro-3,4,5-trideoxy-D-glycero-D-galacto-non-2-enonic acid. It has a molecular formula of C12H20N4O7 and a molecular we...
Active IngredientZanamivir
Dosage FormPowder
RouteInhalation
Strength5mg
Market StatusPrescription
CompanyGlaxosmithkline

4.2 Therapeutic Uses

Antiviral Agents; Enzyme Inhibitors

National Library of Medicine, SIS; ChemIDplus Record for Zanamivir (139110-80-8), MESH Heading. Available from, as of March 15, 2006: https://chem.sis.nlm.nih.gov/chemidplus/chemidlite.jsp


At this time, CDC recommends the use of oseltamivir or zanamivir for the treatment of infection with swine influenza (H1N1) viruses.

CDC; Interim Guidance on Antiviral Recommendations for Patients with Confirmed or Suspected Swine Influenza A (H1N1) Virus Infection and Close Contacts; Available at https://www.cdc.gov/swineflu/recommendations.htm as of April 27, 2009-04-27. CDC; Health Advisory - Investigation and Interim Recommendations: Swine Influenza (H1N1); Available at https://www.cdc.gov/swineflu/pdf/HAN_042509.pdf as of April 27, 2009


MEDICATION: Antiviral; Influenza viral neuraminidase inhibitor

O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. 13th Edition, Whitehouse Station, NJ: Merck and Co., Inc., 2001., p. 1807


Zanamivir is indicated for the treatment of uncomplicated acute illness due to influenza A virus in adults and children 7 years and older who have been symptomatic for no more than 2 days. Zanamivir must be started within 48 hours after the onset of influenza symptoms. /Included in US product labeling/

Thomson/Micromedex. Drug Information for the Health Care Professional. Volume 1, Greenwood Village, CO. 2006., p. 2991


For more Therapeutic Uses (Complete) data for ZANAMIVIR (6 total), please visit the HSDB record page.


4.3 Drug Warning

Swine influenza (H1N1) viruses contain a unique combination of gene segments that have not been reported previously among swine or human influenza viruses in the US or elsewhere. The H1N1 viruses are resistant to amantadine and rimantadine but not to oseltamivir or zanamivir.

CDC; Interim Guidance on Antiviral Recommendations for Patients with Confirmed or Suspected Swine Influenza A (H1N1) Virus Infection and Close Contacts; Available at https://www.cdc.gov/swineflu/recommendations.htm as of April 27, 2009-04-27. CDC; Health Advisory - Investigation and Interim Recommendations: Swine Influenza (H1N1); Available at https://www.cdc.gov/swineflu/pdf/HAN_042509.pdf as of April 27, 2009


Bronchospasm and decline in lung function have been reported in some patients receiving relenza. Many but not all of these patients had underlying airways disease such as asthma or chronic obstructive pulmonary disease. Because of the risk of serious adverse events and because efficacy has not been demonstrated in this population, /zanamivir/ is not generally recommend for treatment of patients with underlying airways disease. Some patients with serious adverse events during treatment with /zanamivir/ have had fatal outcomes, although causality was difficult to assess. /Zanamivir/ should be discontinued in any patient who develops bronchospasm or decline in respratory function; immediate treatment and hospitalization may be required. Some patients without prior pulmonary disease may also have respiratory abnormalities from acute respiratory infection that could resemble adverse drug reactions or increase patient vulnerability to adverse drug reactions.

Physicians Desk Reference 60th ed, Thomson PDR, Montvale, NJ 2006., p. 1526


FDA Pregnancy Risk Category: B /NO EVIDENCE OF RISK IN HUMANS. Adequate, well controlled studies in pregnant women have not shown increased risk of fetal abnormalities despite adverse findings in animals, or, in the absence of adequate human studies, animal studies show no fetal risk. The chance of fetal harm is remote but remains a possibility./

Thomson/Micromedex. Drug Information for the Health Care Professional. Volume 1, Greenwood Village, CO. 2006., p. 2991


Adverse effects occurring in 1-3% or more of adults and children 12 years of age or older include diarrhea; nausea; vomiting; nasal signs and symptoms; bronchitis; sinusitis; cough; ear, nose, and throat infections; headache; and dizziness. No adverse effect occurred at an incidence greater than 3%. Adverse effects occurring in up to 5% of children 5-12 years of age include ear, nose, and throat infections; vomiting; nausea; and diarrhea. Some adverse effects may be secondary to lactose vehicle inhalation. Bronchospasm and allergic-like reactions, including oropharyngeal edema and serious rash, have been reported. Unlike amantadine and rimantadine, neuraminidase inhibitors like zanamivir do not appear to adversely affect the CNS.

McEvoy, G.K. (ed.). American Hospital Formulary Service- Drug Information 2005. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 2005 (Plus Supplements)., p. 769


For more Drug Warnings (Complete) data for ZANAMIVIR (10 total), please visit the HSDB record page.


4.4 Drug Indication

For the prevention and treatment of influenza A and B.


FDA Label


Dectova is indicated for the treatment of complicated and potentially life-threatening influenza A or B virus infection in adult and paediatric patients (aged 6 months) when:

- The patients influenza virus is known or suspected to be resistant to anti-influenza medicinal products other than zanamivir, and/or

- Other anti-viral medicinal products for treatment of influenza, including inhaled zanamivir, are not suitable for the individual patient.

Dectova should be used in accordance with official guidance.


Prevention of influenza, Treatment of influenza


5 Pharmacology and Biochemistry
5.1 Pharmacology

Zanamivir, an antiviral agent, is a neuraminidase inhibitor indicated for treatment of uncomplicated acute illness due to influenza A and B virus in adults and pediatric patients 7 years and older who have been symptomatic for no more than 2 days. Zanamivir has also been shown to significantly inhibit the human sialidases NEU3 and NEU2 in the micromolar range (Ki 3.7 +/-0.48 and 12.9+/-0.07 microM, respectively), which could account for some of the rare side effects of zanamivir.


5.2 MeSH Pharmacological Classification

Antiviral Agents

Agents used in the prophylaxis or therapy of VIRUS DISEASES. Some of the ways they may act include preventing viral replication by inhibiting viral DNA polymerase; binding to specific cell-surface receptors and inhibiting viral penetration or uncoating; inhibiting viral protein synthesis; or blocking late stages of virus assembly. (See all compounds classified as Antiviral Agents.)


Enzyme Inhibitors

Compounds or agents that combine with an enzyme in such a manner as to prevent the normal substrate-enzyme combination and the catalytic reaction. (See all compounds classified as Enzyme Inhibitors.)


5.3 FDA Pharmacological Classification
5.3.1 Active Moiety
ZANAMIVIR
5.3.2 FDA UNII
L6O3XI777I
5.3.3 Pharmacological Classes
Neuraminidase Inhibitors [MoA]; Neuraminidase Inhibitor [EPC]
5.4 ATC Code

J05AH01


J - Antiinfectives for systemic use

J05 - Antivirals for systemic use

J05A - Direct acting antivirals

J05AH - Neuraminidase inhibitors

J05AH01 - Zanamivir


5.5 Absorption, Distribution and Excretion

Absorption

Absolute bioavailability is very low following oral administration (2%). Following oral inhalation, bioavailability is 4% to 17%.


Route of Elimination

It is excreted unchanged in the urine with excretion of a single dose completed within 24 hours. Unabsorbed drug is excreted in the feces.Zanamivir is renally excreted as unchanged drug.


Clearance

2.5 - 10.9 L/h [Following oral inhalation 10 mg]

5.3 L/h [Normal renal function receiving IV single dose of 4 mg or 2 mg]

2.7 L/h [Patients with mild and moderate renal impairement receiving IV single dose of 4 mg or 2 mg]

0.8 L/h [Patients with severe renal impairement receiving IV single dose of 4 mg or 2 mg]


Protein binding: Very low (<10%).

Thomson/Micromedex. Drug Information for the Health Care Professional. Volume 1, Greenwood Village, CO. 2006., p. 2991


Orally inhaled zanamivir is systemically absorbed, approximately 4% to 17%.

Thomson/Micromedex. Drug Information for the Health Care Professional. Volume 1, Greenwood Village, CO. 2006., p. 2991


Elimination: Renal: Excreted unchanged in the urine with excretion of a single dose completed within 24 hours. Total clearance ranges from 2.5 to 10.9 L/hr. Fecal: Unabsorbed drug is secreted in the feces.

Thomson/Micromedex. Drug Information for the Health Care Professional. Volume 1, Greenwood Village, CO. 2006., p. 2991


Time to peak effect: 72 hours.

Thomson/Micromedex. Drug Information for the Health Care Professional. Volume 1, Greenwood Village, CO. 2006., p. 2991


For more Absorption, Distribution and Excretion (Complete) data for ZANAMIVIR (7 total), please visit the HSDB record page.


5.6 Metabolism/Metabolites

Not metabolized


Not metabolized.

Thomson/Micromedex. Drug Information for the Health Care Professional. Volume 1, Greenwood Village, CO. 2006., p. 2991


5.7 Biological Half-Life

2.5-5.1 hours


The serum half-life of zanamivir following administration by oral inhalation ranges from 2.5 to 5.1 hours.

Physicians Desk Reference 60th ed, Thomson PDR, Montvale, NJ 2006., p. 1526


5.8 Mechanism of Action

The proposed mechanism of action of zanamivir is via inhibition of influenza virus neuraminidase with the possibility of alteration of virus particle aggregation and release. By binding and inhibiting the neuraminidase protein, the drug renders the influenza virus unable to escape its host cell and infect others.


Zanamivir is a potent selective competitive inhibitor of the influenza virus neuraminidase, an enzyme essential for viral replication. Neuraminidase cleaves terminal sialic acid residues from glycoconjugates to enable the release of virus from infected cells, prevent the formation of viral aggragates after release from host cells, and possibly decrease viral inactivation by respiratory mucous.

McEvoy, G.K. (ed.). American Hospital Formulary Service- Drug Information 2005. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 2005 (Plus Supplements)., p. 769


Zanamivir is a selective inhibitor of influenza A and B virus neuraminidase, possibly altering particle aggregation and release.

Thomson/Micromedex. Drug Information for the Health Care Professional. Volume 1, Greenwood Village, CO. 2006., p. 2991