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2D Structure
Also known as: 49763-96-4, Diacomit, Bcx 2600, 1-(1,3-benzodioxol-5-yl)-4,4-dimethyl-1-penten-3-ol, 137767-55-6, Bcx-2600
Molecular Formula
C14H18O3
Molecular Weight
234.29  g/mol
InChI Key
IBLNKMRFIPWSOY-FNORWQNLSA-N
FDA UNII
R02XOT8V8I

Stiripentol is an anticonvulsant drug used in the treatment of epilepsy as an adjunct therapy along with [DB00349] and [DB00313]. This drug is currently approved in the USA, Canada, and European countries as oral tablets marketed as Diacomit. FDA approval of this drug was granted on August 20, 2018,. Unrelated to other anticonvulsants, stiripentol belongs to the group of aromatic allylic alcohols and may potentiate the effect of other antiepileptic drugs (AEDs) due to pharmacokinetic interactions. It elevates the levels of gamma-aminobutyric acid (GABA), a major inhibitory neurotransmitter that regulates electrical activity in the central nervous system.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
(E)-1-(1,3-benzodioxol-5-yl)-4,4-dimethylpent-1-en-3-ol
2.1.2 InChI
InChI=1S/C14H18O3/c1-14(2,3)13(15)7-5-10-4-6-11-12(8-10)17-9-16-11/h4-8,13,15H,9H2,1-3H3/b7-5+
2.1.3 InChI Key
IBLNKMRFIPWSOY-FNORWQNLSA-N
2.1.4 Canonical SMILES
CC(C)(C)C(C=CC1=CC2=C(C=C1)OCO2)O
2.1.5 Isomeric SMILES
CC(C)(C)C(/C=C/C1=CC2=C(C=C1)OCO2)O
2.2 Other Identifiers
2.2.1 UNII
R02XOT8V8I
2.3 Synonyms
2.3.1 MeSH Synonyms

1. D-306

2. Diacomit

2.3.2 Depositor-Supplied Synonyms

1. 49763-96-4

2. Diacomit

3. Bcx 2600

4. 1-(1,3-benzodioxol-5-yl)-4,4-dimethyl-1-penten-3-ol

5. 137767-55-6

6. Bcx-2600

7. 1-(benzo[d][1,3]dioxol-5-yl)-4,4-dimethylpent-1-en-3-ol

8. 4,4-dimethyl-1-((3,4-methylenedioxy)phenyl)-1-penten-3-ol

9. (1e)-1-(2h-1,3-benzodioxol-5-yl)-4,4-dimethylpent-1-en-3-ol

10. Ncgc00185769-01

11. Estiripentol

12. 1-penten-3-ol, 4,4-dimethyl-1-(3,4-methylenedioxyphenyl)-

13. (e)-1-(benzo[d][1,3]dioxol-5-yl)-4,4-dimethylpent-1-en-3-ol

14. 1-penten-3-ol, 1-(1,3-benzodioxol-5-yl)-4,4-dimethyl-

15. Stiripentolum

16. Stiripentol [mi]

17. Stiripentol [inn]

18. Stiripentol [jan]

19. Stiripentol [usan:inn]

20. Stiripentol [usan]

21. Stiripentolum [inn-latin]

22. Estiripentol [inn-spanish]

23. Stiripentol [mart.]

24. 4,4-dimethyl-1-(3,4-methylenedioxyphenyl)-1-penten-3-ol

25. Smr000449279

26. Stiripentol [who-dd]

27. Stiripentol [ema Epar]

28. R02xot8v8i

29. Einecs 256-480-9

30. Mfcd00869310

31. Brn 1313047

32. (e)-1-(1,3-benzodioxol-5-yl)-4,4-dimethylpent-1-en-3-ol

33. Diacomit (tn)

34. Me-2080

35. Cpd000449279

36. Dsstox_cid_28994

37. Dsstox_rid_83259

38. Dsstox_gsid_49068

39. 5-19-02-00640 (beilstein Handbook Reference)

40. Mls000758313

41. Mls001424144

42. Schembl216436

43. Stiripentol (jan/usan/inn)

44. Gtpl5469

45. Schembl2533815

46. Chembl1983350

47. Chebi:94435

48. Stiripentol, >=98% (hplc)

49. Dtxsid80860609

50. Stiripentol [orange Book]

51. Hms2052k07

52. Hms2232p06

53. Hms3886m17

54. Bcp10434

55. Tox21_113622

56. Bdbm50504273

57. S5266

58. Akos025149123

59. Akos027255159

60. Ccg-101092

61. Ccg-266819

62. Cs-7801

63. Db09118

64. Nc00342

65. Ncgc00185769-02

66. Bs-16863

67. Cas-49763-96-4

68. Hy-103392

69. D05928

70. W10731

71. Bcx2600; Bcx-2600; Bcx 2600

72. 763s964

73. Q412182

74. (1e)-1-(1,3-benzodioxol-5-yl)-4,4-dimethyl-1-penten-3-ol

75. (e)-1-(3,4-methylenedioxyphenyl)-4,4-dimethyl-1-penten-3-ol

76. 131206-47-8

2.4 Create Date
2005-09-13
3 Chemical and Physical Properties
Molecular Weight 234.29 g/mol
Molecular Formula C14H18O3
XLogP33.6
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count3
Rotatable Bond Count3
Exact Mass234.125594432 g/mol
Monoisotopic Mass234.125594432 g/mol
Topological Polar Surface Area38.7 Ų
Heavy Atom Count17
Formal Charge0
Complexity280
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count1
Defined Bond Stereocenter Count1
Undefined Bond Stereocenter Count0
Covalently Bonded Unit Count1
4 Drug and Medication Information
4.1 Drug Indication

Indicated for use in conjunction with clobazam and valproate as adjunctive therapy of refractory generalized tonic-clonic seizures in patients with severe myoclonic epilepsy in infancy (SMEI, Dravets syndrome) whose seizures are not adequately controlled with clobazam and valproate.


Diacomit is indicated for use in conjunction with clobazam and valproate as adjunctive therapy of refractory generalized tonic-clonic seizures in patients with severe myoclonic epilepsy in infancy (SMEI, Dravet's syndrome) whose seizures are not adequately controlled with clobazam and valproate.


5 Pharmacology and Biochemistry
5.1 Pharmacology

Stiripentol is an orphan drug that effectively reduces seizure frequency in infantile epilepsy as an adjunct therapy and also exhibits a therapeutic advantage in improving the efficacy of other antiepileptic drugs. It potentiates GABA transmission by elevating the levels of the inhibitory neurotransmitters in the brain. Stiripentol is a positive allosteric modulator of GABA-A receptors in the brain that enhances the opening duration of the channel by binding to a site different than the benzodiazepine binding site. Reduced synaptosomal uptake of GABA and/or inhibition of GABA transaminase may also explain the role of stiripentol in reducing the events of seizure. The anticonvulsant activity of stiripentol is age-dependent, with increased efficacy in younger patients.


5.2 MeSH Pharmacological Classification

Anticonvulsants

Drugs used to prevent SEIZURES or reduce their severity. (See all compounds classified as Anticonvulsants.)


5.3 ATC Code

N03AX17


N - Nervous system

N03 - Antiepileptics

N03A - Antiepileptics

N03AX - Other antiepileptics

N03AX17 - Stiripentol


5.4 Absorption, Distribution and Excretion

Absorption

Absorption of stiripentol is quick with the peak plasma concentration reached within 1.5 hours following oral administration. The systemic exposure increases in a dose-proportional relationship. It is rapidly taken up into the brain and enters the cerebellum and medulla. It displays low bioavailability due to water insolubility and metabolism.


Route of Elimination

Renal elimination is mainly responsible for excretion of stiripentol. About 73% of total administered dose is found in urine as metabolites, while further 13-24% of the total dose is recovered in faeces as unchanged substance.


Volume of Distribution

The average volume of distribution is 1.03 L/kg but does not display a dose-dependent relationship. It is expected to be distributed into the extravascular space and with a high degree of tissue binding.


Clearance

Plasma clearance decreases markedly at high doses; it falls from approximately 40 L/kg/day at the dose of 600 mg/day to about 8 L/kg/day at the dose of 2,400 mg. Decreased clearance is probably explained by inhibition of the cytochrome P450 isoenzymes that catalyzes stiripentol metabolism.


5.5 Metabolism/Metabolites

There are 13 metabolites from extensive metabolism stiripentol that are found in urine. The predominant metabolic pathways involve demethylenation and glucuronidation. Other metabolic pathways are oxidative cleavage of the methylenedioxy ring system, O-methylation of catechol metabolites, hydroxylation of the t-butyl group and conversion of the allylic alcohol side-chain to the isomeric 3-pentanone structure. Based on in vitro studies, phase I metabolism of stiripentol involves enzymatic activity of CYP1A2, CYP2C19 and CYP3A4.


5.6 Biological Half-Life

Elimination half life is approximately ranges from 4.5 to 13 hours, in a dose-dependent manner.


5.7 Mechanism of Action

Stiripentol enhances GABAergic inhibition and prolongs the open duration of GABA-A receptor chloride channels by a barbiturate-like mechanism. It binds to GABA-A receptors containing any of the , , , or -subunits but displays strongest potency when bound to receptors containing 3 or subunits. Stiripentol is an inhibitor of lactate dehydrogenase (LDH), which plays a physiological role in energy metabolism of neurons and regulation of neuronal excitation. It binds to the site separate from lactate and pyruvate binding sites of the enzyme and inhibits both pyruvate-to-lactate conversion and lactate-to-pyruvate conversion. LDH inhibitors including stiripentol as antiepileptic treatments mimic ketogenic diet, where the energy source in the brain is switched from glucose to mainly ketone bodies. The ketone bodies directly regulate neuronal excitation and seizures via ATP-sensitive potassium channels and vesicular glutamate transporters. As a potent inhibitor of hepatic cytochrome P450 enzymes, mainly CYP3A4 and CYP2C19, stiripentol co-administration with other antiepileptic drugs elevates the free unchanged active drugs (such as carbamazepine, sodium valproate, phenytoin, phenobarbital and many benzodiazepines) in the circulation to mediate their therapeutic actions.