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124832-26-4 , Valaciclovir, CAS:124832-26-4

124832-26-4, Valaciclovir,
CAS:124832-26-4
C13H20N6O4 / 324.34

伐昔洛韦, Valaciclovir

Valacyclovir is an antiviral drug used in the management of herpes simplex, herpes zoster, and herpes B.IC50 Value: 2.9 microg/ml (for HSV-1 W)[4].Target: HSV infectionin vitro: VACV uptake was concentration dependent and saturable with a Michaelis-Menten constant and maximum velocity of 1.64 +/- 0.06 mM and 23.34 +/- 0.36 nmol/mg protein/5 min, respectively. A very similar Km value was obtained in hPEPT1/CHO cells and in rat and rabbit tissues and Caco-2 cells, suggesting that hPEPT1 dominates the intestinal transport properties of VACV in vitro [5].in vivo: For treatment of a first episode of genital herpes, a large comparative trial has shown that valacyclovir (1 g twice a day) is as effective as acyclovir (200 mg five times a day) when given for 10 days. For treating recurrences, two trials show that valacyclovir is as effective as acyclovir (200 mg five times a day) with a treatment period of 5 days. A daily dose of 1 g of valacyclovir is as effective as 2 g daily. Valacyclovir can be administered once a day[1]. The concentrations of acyclovir in serum and CSF were measured at steady state after 6 days of oral treatment with 1,000 mg of valacyclovir three times a day [2]. EC50 values of PE and AC in 3T3 cells were 0.02 and 0.01 ug/ml, while values in BHK cells were 0.2 and 0.03 ug/ml. Treatment of infected immunosuppressed mice and FA and VA (b.i.d., 5.5 days) reduced the proportion with erythema from 100% to 24% and 38%, and eliminated ear paralysis, ear lesions (vesicles, etc) and death. Virus was absent from ear and brainstem by day 6, but reappeared after discontinuation in mice treated with VA [3].Clinical trial: Evaluation of Valaciclovir in Patients with Chickenpox. 

Title: Valacyclovir

CAS Registry Number: 124832-26-4

CAS Name: L-Valine 2-[(2-amino-1,6-dihydro-6-oxo-9H-purin-9-yl)methoxy]ethyl ester

Additional Names: L-valine ester with 9-[(2-hydroxyethoxy)methyl]guanine; valaciclovir; ValACV

Molecular Formula: C13H20N6O4

Molecular Weight: 324.34

Percent Composition: C 48.14%, H 6.22%, N 25.91%, O 19.73%

Literature References: L-Valine ester prodrug of acyclovir, q.v. Prepn: T. A. Krenitsky et al., EP 308065; L. M. Beauchamp, US 4957924 (1989, 1990 both to Wellcome). Evaluation as prodrug: L. M. Beauchamp et al., Antiviral Chem. Chemother. 3, 157 (1992). Clinical pharmacokinetics: S. Weller et al., Clin. Pharmacol. Ther. 54, 595 (1993). Review of pharmacology and clinical efficacy in herpes virus infections: C. M. Perry, D. Faulds, Drugs 52, 754-772 (1996). Clinical trial to prevent cytomegalovirus disease in renal transplantation: D. Lowance et al., N. Engl. J. Med. 340, 1462 (1999); to prevent transmission of genital herpes: L. Corey et al., ibid. 350, 11 (2004).

 

Derivative Type: Hydrochloride

CAS Registry Number: 124832-27-5

Manufacturers' Codes: 256U; BW-256U87; BW-256

Trademarks: Valtrex (GSK)

Properties: Crystalline solid, occurs as hydrate. uv max (water): 252.8 nm (e 8530). Soly in water: 174 mg/ml.

Absorption maximum: uv max (water): 252.8 nm (e 8530)

 

Therap-Cat: Antiviral.

Keywords: Antiviral; Purines/Pyrimidinones.

CAS Number124832-26-4
Product NameValaciclovir
IUPAC Name2-[(2-amino-6-oxo-1H-purin-9-yl)methoxy]ethyl (2S)-2-amino-3-methylbutanoate
Molecular FormulaC13H20N6O4
Molecular Weight324.34 g/mol
InChIInChI=1S/C13H20N6O4/c1-7(2)8(14)12(21)23-4-3-22-6-19-5-16-9-10(19)17-13(15)18-11(9)20/h5,7-8H,3-4,6,14H2,1-2H3,(H3,15,17,18,20)/t8-/m0/s1
InChI KeyHDOVUKNUBWVHOX-QMMMGPOBSA-N
SMILESCC(C)C(C(=O)OCCOCN1C=NC2=C1N=C(NC2=O)N)N
Synonyms2-((2-amino-6-oxo-3H-purin-9(6H)-yl)methoxy)ethyl 2-amino-3-methylbutanoate
Canonical SMILESCC(C)C(C(=O)OCCOCN1C=NC2=C1NC(=NC2=O)N)N
Isomeric SMILESCC(C)[C@@H](C(=O)OCCOCN1C=NC2=C1NC(=NC2=O)N)N


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