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Antiinfective agent stubs
Uprifosbuvir
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Uprifosbuvir

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Uprifosbuvir
Uprifosbuvir structure.svg
Clinical data
Trade names Uprifosbuvir
Legal status
Legal status
Identifiers
  • propan-2-yl (2R)-2-[[[(2R,3R,4R,5R)-4-chloro-5-(2,4-dioxopyrimidin-1-yl)-3-hydroxy-4-methyloxolan-2-yl]methoxy-phenoxyphosphoryl]amino]propanoate
CAS Number
PubChem CID
DrugBank
ChemSpider
UNII
KEGG
ChEMBL
Chemical and physical data
Formula C22H29ClN3O9P
Molar mass 545.9 g·mol−1
3D model (JSmol)
  • C[C@H](C(=O)OC(C)C)N[P@@](=O)(OC[C@@H]1[C@H]([C@@]([C@@H](O1)N2C=CC(=O)NC2=O)(C)Cl)O)OC3=CC=CC=C3
  • InChI=1S/C22H29ClN3O9P/c1-13(2)33-19(29)14(3)25-36(31,35-15-8-6-5-7-9-15)32-12-16-18(28)22(4,23)20(34-16)26-11-10-17(27)24-21(26)30/h5-11,13-14,16,18,20,28H,12H2,1-4H3,(H,25,31)(H,24,27,30)/t14-,16-,18-,20-,22-,36-/m1/s1
  • Key:SFPFZQKYPOWCSI-KHFYHRBSSA-N

Uprifosbuvir (MK-3682) is an antiviral drug developed for the treatment of hepatitis C. It is a nucleotide analogue which acts as an NS5B RNA polymerase inhibitor. As of 2019 it was in Phase III human clinical trials.

In 2017 owner Merck wrote down the value of uprifosbuvir to US$240 million, for a write-down of $2.9 billion, reducing its earnings per share from 42¢ to a loss of 22¢ for the fourth quarter of 2016. This was attributed to the hepatitis C drug market rather than uprifosbuvir itself; the population of treatable patients diminished rapidly after the introduction in 2014 of sofosbuvir and the combination ledipasvir/sofosbuvir, drugs that cured hepatitis C, and whose market was also diminishing following their success in curing patients. Clinical testing of uprifosbuvir continued.


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