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2D Structure
Also known as: 1187594-09-7, Olumiant, Incb028050, Ly3009104, 2-(3-(4-(7h-pyrrolo[2,3-d]pyrimidin-4-yl)-1h-pyrazol-1-yl)-1-(ethylsulfonyl)azetidin-3-yl)acetonitrile, Incb 028050
Molecular Formula
C16H17N7O2S
Molecular Weight
371.4  g/mol
InChI Key
XUZMWHLSFXCVMG-UHFFFAOYSA-N
FDA UNII
ISP4442I3Y

Baricitinib is an orally bioavailable inhibitor of Janus kinases 1 and 2 (JAK1/2), with potential anti-inflammatory, immunomodulating and antineoplastic activities. Upon administration, baricitinib binds to JAK1/2, which inhibits JAK1/2 activation and leads to the inhibition of the JAK-signal transducers and activators of transcription (STAT) signaling pathway. This decreases the production of inflammatory cytokines and may prevent an inflammatory response. In addition, baricitinib may induce apoptosis and reduce proliferation of JAK1/2-expressing tumor cells. JAK kinases are intracellular enzymes involved in cytokine signaling, inflammation, immune function and hematopoiesis; they are also upregulated and/or mutated in various tumor cell types.
Baricitinib is a Janus Kinase Inhibitor. The mechanism of action of baricitinib is as a Janus Kinase Inhibitor.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
2-[1-ethylsulfonyl-3-[4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)pyrazol-1-yl]azetidin-3-yl]acetonitrile
2.1.2 InChI
InChI=1S/C16H17N7O2S/c1-2-26(24,25)22-9-16(10-22,4-5-17)23-8-12(7-21-23)14-13-3-6-18-15(13)20-11-19-14/h3,6-8,11H,2,4,9-10H2,1H3,(H,18,19,20)
2.1.3 InChI Key
XUZMWHLSFXCVMG-UHFFFAOYSA-N
2.1.4 Canonical SMILES
CCS(=O)(=O)N1CC(C1)(CC#N)N2C=C(C=N2)C3=C4C=CNC4=NC=N3
2.2 Other Identifiers
2.2.1 UNII
ISP4442I3Y
2.3 Synonyms
2.3.1 MeSH Synonyms

1. 3-azetidineacetonitrile, 1-(ethylsulfonyl)-3-(4-(7h-pyrrolo(2,3-d)pyrimidin-4-yl)-1h-pyrazol-1-yl)-

2. 3-azetidineacetonitrile, 1-(ethylsulfonyl)-3-(4-(7h-pyrrolo(2,3-d)pyrimidin-4-yl)-1h-pyrazol-1-yl)-, Phosphate (1:1)

3. Baricitinib Phosphate

4. Baricitinib Phosphate Salt

5. Incb-028050

6. Incb-28050

7. Incb028050

8. Ly-3009104

9. Ly3009104

10. Olumiant

2.3.2 Depositor-Supplied Synonyms

1. 1187594-09-7

2. Olumiant

3. Incb028050

4. Ly3009104

5. 2-(3-(4-(7h-pyrrolo[2,3-d]pyrimidin-4-yl)-1h-pyrazol-1-yl)-1-(ethylsulfonyl)azetidin-3-yl)acetonitrile

6. Incb 028050

7. Incb-028050

8. Ly-3009104

9. 1-(ethylsulfonyl)-3-[4-(7h-pyrrolo[2,3-d]pyrimidin-4-yl)-1h-pyrazol-1-yl]-3-azetidineacetonitrile

10. Baricitinib (ly3009104, Incb028050)

11. 2-[1-ethylsulfonyl-3-[4-(7h-pyrrolo[2,3-d]pyrimidin-4-yl)pyrazol-1-yl]azetidin-3-yl]acetonitrile

12. Isp4442i3y

13. Ly 3009104

14. 3-azetidineacetonitrile, 1-(ethylsulfonyl)-3-(4-(7h-pyrrolo(2,3-d)pyrimidin-4-yl)-1h-pyrazol-1-yl)-

15. Ly3009104 (phosphate);incb028050 (phosphate)

16. Incb28050

17. Baricitinib [usan]

18. Baricitinib [usan:inn]

19. Unii-isp4442i3y

20. Incb 28050

21. Olumiant (tn)

22. 3-azetidineacetonitrile, 1-(ethylsulfonyl)-3-[4-(7h-pyrrolo[2,3-d]pyrimidin-4-yl)-1h-pyrazol-1-yl]-

23. 3jw

24. Baricitinib [mi]

25. Baricitinib [inn]

26. Baricitinib [jan]

27. Baricitinib [who-dd]

28. Mls006011247

29. Schembl871150

30. Baricitinib (jan/usan/inn)

31. Baricitinib (ly3009104)

32. Baricitinib [ema Epar]

33. Baricitinib (incb028050)

34. Gtpl7792

35. Chembl2105759

36. Chebi:95341

37. Baricitinib [orange Book]

38. Dtxsid30152228

39. Ex-a413

40. Hms3651l17

41. Hms3672m15

42. Hms3747g21

43. Bcp04686

44. Bdbm50021656

45. Mfcd21608464

46. Nsc799357

47. S2851

48. Zinc73069247

49. Akos022186127

50. Akos025401933

51. Am81232

52. Bcp9000380

53. Ccg-268312

54. Cs-0724

55. Db11817

56. Ds-7641

57. Nsc-799357

58. Pb27275

59. Sb10845

60. Ncgc00345839-01

61. Ncgc00345839-14

62. Ncgc00345839-16

63. 2-(3-(4-(3h-pyrrolo[2,3-d]pyrimidin-4-yl)-1h-pyrazol-1-yl)-1-(ethylsulfonyl)azetidin-3-yl)acetonitrile

64. Ac-27404

65. Hy-15315

66. Smr004703006

67. Bcp0726000031

68. Baricitinib (incb28050, Ly3009104)

69. Ft-0775037

70. Sw220096-1

71. D10308

72. A892931

73. En300-24435973

74. J-503551

75. Q4860707

76. (1-(ethylsulfonyl)-3-(4-(7h-pyrrolo(2,3-d)pyrimidin-4-yl)-1h-pyrazol-1-yl)azetidin-3-yl)ethanenitrile

77. {1-(ethylsulfonyl)-3-[4-(7h-pyrrolo[2,3-d]pyrimidin-4-yl)-1h-pyrazol-1-yl]azetidin-3-yl}acetonitrile

78. 2-[1-(ethanesulfonyl)-3-(4-{7h-pyrrolo[2,3-d]pyrimidin-4-yl}-1h-pyrazol-1-yl)azetidin-3-yl]acetonitrile

79. Incb 28050; Incb28050; Ly-3009104;1-(ethylsulfonyl)-3-[4-(7h-pyrrolo[2,3-d]pyrimidin-4-yl)-1h-pyrazol-1-yl]-3-azetidineacetonitrile

2.4 Create Date
2009-09-28
3 Chemical and Physical Properties
Molecular Weight 371.4 g/mol
Molecular Formula C16H17N7O2S
XLogP3-0.5
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count7
Rotatable Bond Count5
Exact Mass g/mol
Monoisotopic Mass g/mol
Topological Polar Surface Area129
Heavy Atom Count26
Formal Charge0
Complexity678
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 Indication

In the US and Europe, baricitinib is indicated for the treatment of adult patients with moderately to severely active rheumatoid arthritis who have had an inadequate response to one or more TNF blockers. Baricitinib may be used as monotherapy or in combination with [methotrexate] or other DMARDs. In Europe, baricitinib is indicated for the treatment of moderate to severe atopic dermatitis in adult patients who are candidates for systemic therapy. In the US, baricitinib is also indicated for the treatment of coronavirus disease 2019 (COVID-19) in hospitalized adults requiring supplemental oxygen, non-invasive or invasive mechanical ventilation, or extracorporeal membrane oxygenation. Recently, it is also approved as the treatment for severe alopecia areata in adults.


Rheumatoid arthritis

Baricitinib is indicated for the treatment of moderate to severe active rheumatoid arthritis in adult patients who have responded inadequately to, or who are intolerant to one or more disease modifying anti rheumatic drugs. Olumiant may be used as monotherapy or in combination with methotrexate.

Atopic Dermatitis

Baricitinib is indicated for the treatment of moderate to severe atopic dermatitis in adult patients who are candidates for systemic therapy.

Alopecia areata

Baricitinib is indicated for the treatment of severe alopecia areata in adult patients (see section 5. 1).


Treatment of chronic idiopathic arthritis (including rheumatoid arthritis , ankylosing spondylarthritis , psoriatic arthritis and juvenile idiopathic arthritis )


Treatment of Systemic Lupus Erythematosus (SLE)


Treatment of Coronavirus disease 2019


Treatment of alopecia areata


Treatment of atopic dermatitis


5 Pharmacology and Biochemistry
5.1 ATC Code

L04AA37


L04AA37

S76 | LUXPHARMA | Pharmaceuticals Marketed in Luxembourg | Pharmaceuticals marketed in Luxembourg, as published by d'Gesondheetskeess (CNS, la caisse nationale de sante, www.cns.lu), mapped by name to structures using CompTox by R. Singh et al. (in prep.). List downloaded from https://cns.public.lu/en/legislations/textes-coordonnes/liste-med-comm.html. Dataset DOI:10.5281/zenodo.4587355


L - Antineoplastic and immunomodulating agents

L04 - Immunosuppressants

L04A - Immunosuppressants

L04AA - Selective immunosuppressants

L04AA37 - Baricitinib


5.2 Absorption, Distribution and Excretion

Absorption

The absolute bioavailability of baricitinib is approximately 80%. The Cmax was reached after one hour of oral drug administration. A high-fat meal decreased the mean AUC and Cmax of baricitinib by approximately 11% and 18%, respectively, and delayed Tmax by 0.5 hours.


Route of Elimination

Baricitinib is predominantly excreted via renal elimination. It is cleared via filtration and active secretion. Approximately 75% of the administered dose was eliminated in the urine, with 20% of that dose being the unchanged drug. About 20% of the dose was eliminated in the feces, with 15% of that dose being an unchanged drug.


Volume of Distribution

Following intravenous administration, the volume of distribution was 76 L, indicating distribution into tissues.


Clearance

The total body clearance of baricitinib was 8.9 L/h in patients with rheumatoid arthritis. The total body clearance and half-life of baricitinib was 14.2 L/h in intubated patients with COVID-19 who received baricitinib via nasogastric (NG) or orogastric (OG) tube.


5.3 Metabolism/Metabolites

Baricitinib is metabolized by CYP3A4. Approximately 6% of the orally administered dose was identified as metabolites in urine and feces; however, no metabolites of baricitinib were quantifiable in plasma.


5.4 Biological Half-Life

The elimination half-life in patients with rheumatoid arthritis is approximately 12 hours. The elimination half-life was 10.8 hours in intubated patients with COVID-19 who received baricitinib via nasogastric (NG) or orogastric (OG) tube.


5.5 Mechanism of Action

As members of the tyrosine kinase family, Janus kinases (JAKs) are intracellular enzymes that modulate signals from cytokines and growth factor receptors involved in hematopoiesis, inflammation, and immune cell function. Upon binding of extracellular cytokines and growth factors, JAKs phosphorylate and activate Signal Transducers and Activators of Transcription (STATs). STATs modulate intracellular activity, including gene transcription of inflammatory mediators that promote an autoimmune response, such as IL-2, IL-6, IL-12, IL-15, IL-23, IFN-, GM-CSF, and interferons. The JAK-STAT pathway has been implicated in the pathophysiology of rheumatoid arthritis, as it is associated with an overproduction of inflammatory mediators. There are four JAK proteins: JAK 1, JAK 2, JAK 3 and TYK2. JAKs form homodimers or heterodimers and pair differently in different cell receptors to transmit cytokine signaling. Baricitinib is a selective and reversible inhibitor of JAK1 and JAK2 with less affinity for JAK3 and TYK2; however, the relevance of inhibition of specific JAK enzymes to therapeutic effectiveness is not currently known. Baricitinib inhibits the activity of JAK proteins and modulates the signaling pathway of various interleukins, interferons, and growth factors. It was also shown to decrease the proliferation of JAK1/JAK2 expression in mutated cells and induce cell apoptosis.