Frovatriptan succinate hydrate

• CAT Number: R008652
• CAS Number: 158930-17-7
• Molecular Formula: C18H25N3O6
• Molecular Weight: 379.41
• Purity: ≥95%
• Synonyms: butanedioic acid;(6R)-6-(methylamino)-6,7,8,9-tetrahydro-5H-carbazole-3-carboxamide;hydrate
• InChI: InChI=1S/C14H17N3O.C4H6O4.H2O/c1-16-9-3-5-13-11(7-9)10-6-8(14(15)18)2-4-12(10)17-13;5-3(6)1-2-4(7)8;/h2,4,6,9,16-17H,3,5,7H2,1H3,(H2,15,18);1-2H2,(H,5,6)(H,7,8);1H2/t9-;;/m1../s1
• InChIKey: CUETXFMONOSVJA-KLQYNRQASA-N
• SMILES: CNC1CCC2=C(C1)C3=C(N2)C=CC(=C3)C(=O)N.C(CC(=O)O)C(=O)O.O

Frovatriptan succinate hydrate ((R)-Frovatriptan succinate hydrate) is a potent, high affinity, selective and orally active 5-HT1B (pK50 of 8.2) and 5-HT1D receptor agonist. Frovatriptan succinate hydrate exhibits >10-fold selectivity for 5-HT1B and 5-HT1D over 5-HT1A, 5-HT1F, and 5-HT7 and >1000-fold selectivity over other 5-HT, dopamine, histamine H1, and α1-adrenoceptor. Frovatriptan succinate hydrate has the potential for migraine research[1][2].
Cerebral vasodilatation and neurogenic inflammation are considered to be prime movers in the pathogenesis of migraine. Activation of 5-HT1B reverses cerebral vasodilatation and activation of 5-HT1D prevents neurogenic inflammation. Frovatriptan has a high affinity for 5-HT1B and 5-HT1D receptors and a moderate affinity for the 5-HT1A and 5-HT1F receptors subtypes. Frovatriptan has a moderate affinity for the 5-HT7 receptors, an action associated with coronary artery relaxation in the dog[1].
Oral bioavailability of Frovatriptan is 22%-30% and is not affected by food. Although the maximum concentration in the plasma is achieved in 2-3 hours, 60%-70% of this is achieved in 1 hour. A steady state is achieved in 4-5 days. Plasma protein binding is low at 15%. The most unique feature is the relative terminal long half-life of about 26 hours. Frovatriptan is chiefly metabolized by CYP1A2 and is cleared by the kidney and liver making moderate failure of either organ not a limiting factor in treatment[1].
Frovatriptan (0.1, 0.2, and 0.3 mg/kg; a single bolus intraduodenal administration) treatment produces an increase in carotid vascular resistance, which is sustained for at least 5 hours in dogs[2].

Reference

[1]. Kelman L. Review of frovatriptan in the treatment of migraine. Neuropsychiatr Dis Treat. 2008 Feb;4(1):49-54.
 [Content Brief]

[2]. Comer MB. Et al. Pharmacology of the selective 5-HT(1B/1D) agonist frovatriptan. Headache. 2002 Apr;42 Suppl 2:S47-53.
 [Content Brief]