Letermovir Related Compounds & Impurities

Letermovir is a viral terminase complex inhibitor with a novel mechanism distinct from nucleoside analogues, used for CMV prophylaxis in stem cell transplant recipients.

Simson Pharma Limited along with its subsidiary offices Simson Pharma Global Ltd. (UK) and Simson Pharma Global LLC (USA) is a trusted manufacturer and supplier of high-quality pharmaceutical reference standards, offering a comprehensive portfolio of Letermovir reference standards, pharmacopeial and non-pharmacopeial Letermovir impurities, related compounds, related substances, metabolites, stable isotope-labelled compounds, deuterium labelled compounds and nitrosamine (N-NO) reference standards.

These materials support pharmaceutical research and development, product development, ANDA and DMF submissions, quality control (QC), analytical method development and validation, stability studies, impurity identification, and genotoxic impurity assessment.

Our Letermovir-related reference standards are thoroughly characterized using advanced analytical techniques and are supplied with comprehensive Certificates of Analysis (COA) and supporting analytical data from our USFDA certified, ISO 17025 and ISO 17034 accredited Lab, to meet global regulatory expectations. EP and USP traceable reference standards can also be provided upon request, subject to availability. Simson is also a provider of EP and USP traceable standards. To ensure consistent quality and reliability, our reference standards are periodically re-tested according to established quality management procedures.

Pharmaceutical Reference Standards / Impurity Standards

Letermovir
Letermovir
  • CAT. No.L1120000
  • CAS. No.917389-32-3
  • Mol. F.C29H28F4N4O4
  • Mol. W.572.55 g/mol
  • Stock Status:Instock
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Letermovir N-Oxide
Letermovir N-Oxide
  • CAT. No.L1120006
  • CAS. No.2991059-71-1
  • Mol. F.C29H28F4N4O5
  • Mol. W.588.55 g/mol
  • Stock Status:Limited Stock
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Letermovir Impurity 11
Letermovir Impurity 11
  • CAT. No.L1120007
  • CAS. No.2991059-69-7
  • Mol. F.C18H14F4N2O4
  • Mol. W.398.31 g/mol
  • Stock Status:Limited Stock
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Letermovir Impurity 14
Letermovir Impurity 14
  • CAT. No.L1120008
  • CAS. No.16015-71-7
  • Mol. F.C11H16N2O
  • Mol. W.192.26 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 9
Letermovir Impurity 9
  • CAT. No.L1120009
  • CAS. No.2991299-71-7
  • Mol. F.C29H26F4N4O4
  • Mol. W.570.54 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 7
Letermovir Impurity 7
  • CAT. No.L1120010
  • CAS. No.2994645-03-1
  • Mol. F.C29H26F4N4O6
  • Mol. W.602.53 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 15
Letermovir Impurity 15
  • CAT. No.L1120011
  • CAS. No.2991059-70-0
  • Mol. F.C22H22F4N4O3
  • Mol. W.466.43 g/mol
  • Stock Status:Instock
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Letermovir Impurity 16
Letermovir Impurity 16
  • CAT. No.L1120012
  • CAS. No.NA
  • Mol. F.C22H21F4N5O4
  • Mol. W.495.43 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Ethyl Ester
Letermovir Ethyl Ester
  • CAT. No.L1120013
  • CAS. No.2758792-79-7
  • Mol. F.C31H32F4N4O4
  • Mol. W.600.60 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 17
Letermovir Impurity 17
  • CAT. No.L1120014
  • CAS. No.917389-37-8
  • Mol. F.C29H28F4N4O4
  • Mol. W.572.55 g/mol
  • Stock Status:Instock
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Letermovir Impurity 1
Letermovir Impurity 1
  • CAT. No.L1120015
  • CAS. No.NA
  • Mol. F.C40H43F3N6O5
  • Mol. W.744.80 g/mol
  • Stock Status:Custom Synthesis
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3-Fluoro Letermovir
3-Fluoro Letermovir
  • CAT. No.L1120016
  • CAS. No.NA
  • Mol. F.C29H28F4N4O4
  • Mol. W.572.55 g/mol
  • Stock Status:Custom Synthesis
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4-Fluoro Letermovir
4-Fluoro Letermovir
  • CAT. No.L1120017
  • CAS. No.NA
  • Mol. F.C29H28F4N4O4
  • Mol. W.572.55 g/mol
  • Stock Status:Custom Synthesis
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5-Fluoro Letermovir
5-Fluoro Letermovir
  • CAT. No.L1120018
  • CAS. No.NA
  • Mol. F.C29H28F4N4O4
  • Mol. W.572.55 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 2
Letermovir Impurity 2
  • CAT. No.L1120019
  • CAS. No.NA
  • Mol. F.C28H26F4N4O4
  • Mol. W.558.52 g/mol
  • Stock Status:Instock
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Letermovir Impurity 3
Letermovir Impurity 3
  • CAT. No.L1120020
  • CAS. No.NA
  • Mol. F.C28H26F4N4O4
  • Mol. W.558.52 g/mol
  • Stock Status:Limited Stock
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Letermovir Impurity 18
Letermovir Impurity 18
  • CAT. No.L1120021
  • CAS. No.NA
  • Mol. F.C29H28F4N4O4
  • Mol. W.572.55 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Nitroso Impurity 2
Letermovir Nitroso Impurity 2
  • CAT. No.L1120022
  • CAS. No.NA
  • Mol. F.C21H22FN5O4
  • Mol. W.427.43 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 21
Letermovir Impurity 21
  • CAT. No.L1120023
  • CAS. No.NA
  • Mol. F.C13H8Br2F2N2O
  • Mol. W.406.02 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 22
Letermovir Impurity 22
  • CAT. No.L1120024
  • CAS. No.NA
  • Mol. F.C29H28F4N4O4
  • Mol. W.572.55 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 19
Letermovir Impurity 19
  • CAT. No.L1120025
  • CAS. No.NA
  • Mol. F.C29H29F3N4O4
  • Mol. W.554.56 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 20
Letermovir Impurity 20
  • CAT. No.L1120026
  • CAS. No.NA
  • Mol. F.C29H28F4N4O4
  • Mol. W.572.55 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 23
Letermovir Impurity 23
  • CAT. No.L1120027
  • CAS. No.NA
  • Mol. F.C19H16F4N2O4
  • Mol. W.412.33 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 24
Letermovir Impurity 24
  • CAT. No.L1120028
  • CAS. No.NA
  • Mol. F.C29H28F4N4O4
  • Mol. W.572.55 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 12
Letermovir Impurity 12
  • CAT. No.L1120029
  • CAS. No.917389-29-8
  • Mol. F.C30H30F4N4O4
  • Mol. W.586.58 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 25
Letermovir Impurity 25
  • CAT. No.L1120030
  • CAS. No.NA
  • Mol. F.C19H16F4N2O4
  • Mol. W.412.33 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 26
Letermovir Impurity 26
  • CAT. No.L1120031
  • CAS. No.NA
  • Mol. F.C15H11BrF4N2O2
  • Mol. W.407.16 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 27
Letermovir Impurity 27
  • CAT. No.L1120032
  • CAS. No.NA
  • Mol. F.C29H28F4N4O4
  • Mol. W.572.55 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 5
Letermovir Impurity 5
  • CAT. No.L1120033
  • CAS. No.2872586-94-0
  • Mol. F.C32H34F4N4O4
  • Mol. W.614.63 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 4
Letermovir Impurity 4
  • CAT. No.L1120035
  • CAS. No.NA
  • Mol. F.C22H22F4N4O3
  • Mol. W.466.43 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 25
Letermovir Impurity 25
  • CAT. No.L1120036
  • CAS. No.2758792-73-1
  • Mol. F.C18H14F4N2O4
  • Mol. W.398.31 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 6
Letermovir Impurity 6
  • CAT. No.L1120037
  • CAS. No.NA
  • Mol. F.C33H36F4N4O3
  • Mol. W.612.66 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 8
Letermovir Impurity 8
  • CAT. No.L1120038
  • CAS. No.NA
  • Mol. F.C29H28F4N4O4
  • Mol. W.572.55 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 8
Letermovir Impurity 8
  • CAT. No.L1120039
  • CAS. No.NA
  • Mol. F.C29H28F4N4O4
  • Mol. W.572.55 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 10
Letermovir Impurity 10
  • CAT. No.L1120040
  • CAS. No.NA
  • Mol. F.C29H28F4N4O5
  • Mol. W.588.55 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 13
Letermovir Impurity 13
  • CAT. No.L1120041
  • CAS. No.NA
  • Mol. F.C29H28F4N4O6
  • Mol. W.604.55 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 28
Letermovir Impurity 28
  • CAT. No.L1120042
  • CAS. No.NA
  • Mol. F.C36H34F4N4O4
  • Mol. W.662.67 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 29
Letermovir Impurity 29
  • CAT. No.L1120043
  • CAS. No.NA
  • Mol. F.C28H26F4N4O4
  • Mol. W.558.52 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 30
Letermovir Impurity 30
  • CAT. No.L1120044
  • CAS. No.NA
  • Mol. F.C30H31F3N4O4
  • Mol. W.568.59 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 31
Letermovir Impurity 31
  • CAT. No.L1120045
  • CAS. No.NA
  • Mol. F.C30H30F4N4O4.C20H18O8.C4H8O2
  • Mol. W.1061.03 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 32
Letermovir Impurity 32
  • CAT. No.L1120046
  • CAS. No.NA
  • Mol. F.C31H32F4N4O4
  • Mol. W.600.60 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 33
Letermovir Impurity 33
  • CAT. No.L1120047
  • CAS. No.NA
  • Mol. F.C32H34F4N4O4
  • Mol. W.614.63 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 34
Letermovir Impurity 34
  • CAT. No.L1120048
  • CAS. No.917389-34-5
  • Mol. F.C30H30F4N4O4
  • Mol. W.586.58 g/mol
  • Stock Status:Custom Synthesis
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Letermovir Impurity 35
Letermovir Impurity 35
  • CAT. No.L1120049
  • CAS. No.NA
  • Mol. F.C15H13F4N3O2
  • Mol. W.343.28 g/mol
  • Stock Status:Custom Synthesis
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Isotope Labelled Compounds

Letermovir-d3
Letermovir-d3
  • CAT. No.L1120001
  • CAS. No.917389-32-3
  • Mol. F.C29H25D3F4N4O4
  • Mol. W.575.57 g/mol
  • Stock Status:Custom Synthesis
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Letermovir-d6
Letermovir-d6
  • CAT. No.L1120002
  • CAS. No.NA
  • Mol. F.C29H22D6F4N4O4
  • Mol. W.578.59 g/mol
  • Stock Status:Custom Synthesis
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Letermovir 13CD3
Letermovir 13CD3
  • CAT. No.L1120004
  • CAS. No.NA
  • Mol. F.C2813CH25D3F4N4O4
  • Mol. W.576.56 g/mol
  • Stock Status:Under Synthesis
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Letermovir-D6 (Racemic)
Letermovir-D6 (Racemic)
  • CAT. No.L1120005
  • CAS. No.NA
  • Mol. F.C29H22D6F4N4O4
  • Mol. W.578.59 g/mol
  • Stock Status:Custom Synthesis
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rac Letermovir D8
rac Letermovir D8
  • CAT. No.L1120034
  • CAS. No.NA
  • Mol. F.C29H20D8F4N4O4
  • Mol. W.580.60 g/mol
  • Stock Status:Instock
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