Impurity reference standards

Letermovir impurity standards

For Letermovir, the Zemixal catalogue holds 12 impurity and reference standards that support release testing, stability programmes and regulatory dossiers. Most entries are process-related impurities, synthesis intermediates and isomers.

12reference materials

Parent API

Letermovir

CAS: 917389-32-3
Formula: C₂₉H₂₈F₄N₄O₄
MW: 572.5 g/mol
Code: ZX-006608

Every standard comes with a certificate of analysis. Structure confirmation data, typically NMR, MS and chromatographic purity, is available on request. They are bought for system suitability, peak identification, quantitation against limits and the impurity justification sections of regulatory submissions.

All Letermovir reference materials

1–12 of 12 standards

(S)-2-(8-Fluoro-3-(2-methoxy-5-(trifluoromethyl)phenyl)-2-(4-(3-methoxyphenyl)-3,4-dihydropyrazin-1(2H)-yl)-3,4-dihydroquinazolin-4-yl)acetic Acid

CAS: 2991299-71-7
Formula: C₂₉H₂₆F₄N₄O₄
MW: 570.5 g/mol

ZX-030222

1-(3-Methoxyphenyl)piperazine

CAS: 16015-71-7
Formula: C₁₁H₁₆N₂O
MW: 192.26 g/mol

ZX-030221

2-(8-Fluoro-3-(2-methoxy-5-(trifluoromethyl)phenyl)-2-(piperazin-1-yl)-3,4-dihydroquinazolin-4-yl)acetic Acid

CAS: 2991059-70-0
Formula: C₂₂H₂₂F₄N₄O₃
MW: 466.4 g/mol

ZX-030223

2-(8-Fluoro-3-(2-methoxy-5-(trifluoromethyl)phenyl)-2-oxo-1,2,3,4-tetrahydroquinazolin-4-yl)acetic Acid

CAS: 2991059-69-7
Formula: C₁₈H₁₄F₄N₂O₄
MW: 398.3 g/mol

ZX-025343

3-Amino-4-methoxybenzotrifluoride

CAS: 349-65-5
Formula: C₈H₈F₃NO
MW: 191.15 g/mol

ZX-035796

ent-Letermovir

CAS: 917389-37-8
Formula: C₂₉H₂₈F₄N₄O₄
MW: 572.5 g/mol

ZX-025345

Letermovir

CAS: 917389-32-3
Formula: C₂₉H₂₈F₄N₄O₄
MW: 572.5 g/mol

ZX-006608

Letermovir Dialdehyde Impurity

CAS: 2994645-03-1
Formula: C₂₉H₂₆F₄N₄O₆
MW: 602.5 g/mol

ZX-025344

Letermovir Ethyl Ester

CAS: 2758792-79-7
Formula: C₃₁H₃₂F₄N₄O₄
MW: 600.6 g/mol

ZX-021976

Letermovir Impurity LTRRC-1

CAS: 2991059-71-1
Formula: C₂₉H₂₈F₄N₄O₅
MW: 588.5 g/mol

ZX-004880

Letermovir Methyl Ester

CAS: 917389-29-8
Formula: C₃₀H₃₀F₄N₄O₄
MW: 586.6 g/mol

ZX-025346

Methyl

CAS: 917389-21-0
Formula: C₁₉H₁₆F₄N₂O₄
MW: 412.3 g/mol

ZX-047872

Questions

Letermovir impurities, answered

What Letermovir reference materials are available?

The catalogue currently lists 12 compounds for Letermovir. Each product page shows the CAS number where one is assigned, the structure, formula and molecular weight.

What documents come with a Letermovir impurity standard?

A certificate of analysis travels with every lot. On request we share the characterisation set, usually 1H-NMR, mass spectrum, HPLC purity and IR, and for some materials TGA or water content. Ask for the data before ordering if your QA team needs to review it.

Can Zemixal make a Letermovir impurity that is not listed?

Often yes. Send the structure, name or CAS number with the quantity you need and our sourcing team checks custom synthesis options, usually from 10 mg up to gram scale, with a quoted lead time.

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