Pyrimidines And Derivatives

Medchemexpress LLC HY-112050 5mg Medchemexpress, CU-CPT-8m CAS:125079-83-6 Purity:>98%

Medchemexpress, HY-112050 5mg CU-CPT-8m CAS:125079-83-6 CU-CPT-8m is a specific TLR8 antagonist, with an IC50 of 67 nM. Purity:>98% Medchemexpress has over 10000 novel life-science reagents, reference compounds, APIs and natural compounds for laboratory and scientific use. Other quantity can also be offered.

eMolecules​ Medchem Express / CU-CPT-8m / 5mg / 446260083 / HY-112050 / / 125079-83-6 / [null] / 252.277 / C14H12N4O

Medchem Express / CU-CPT-8m / 5mg / 446260083 / HY-112050 / / 125079-83-6 / [null] / 252.277 / C14H12N4O

Sigma Aldrich Fine Chemicals Biosciences Guanosine suitable for cell culture, BioReagent | 118-00-3 | MFCD00010182 | 5G

Guanosine suitable for cell culture, BioReagent | Purity: >=98% | Mol Wt: 283.24 | 118-00-3 | MFCD00010182 | 5G

Medchemexpress LLC MEDCHEMEXPRESS LLC

5000398791 COPPER TRIPEPTIDE-3 250MG

Medchemexpress LLC Trisbenzyltriazolylm 250mg | 510758-28-8 | 250 MG

Tris(benzyltriazolylmethyl)amine (TBTA) is a tridentate ligand used to stabilize copper(I) catalysts in copper-catalyzed azide-alkyne cycloaddition (CuAAC) reactions. It is employed to improve efficiency and selectivity in bioconjugation workflows for tagging proteins, peptides, and small molecules.

• Stabilizes Cu(I) to improve click reaction efficiency.
• Enhances yield and selectivity in CuAAC conjugations.
• Suitable for protein, peptide, and small-molecule labeling.
• Available as solid and DMSO solution formats for flexible use.
• High purity supports reproducible experimental results.

Medchemexpress LLC Dbco-c3-acid | 1207355-31-4 | 99.7% | 319.36 g/mol | C20H17NO3 | 250 MG

DBCO-C3-Acid is a dibenzylcyclooctyne-functionalized carboxylic acid used as a click-chemistry intermediate for assembling antibody-drug conjugate linkers and other bioconjugates. It supplies a strained alkyne handle for copper-free strain-promoted azide-alkyne cycloaddition (SPAAC), enabling efficient coupling to azide-containing partners. The compound is supplied as a solid with documented purity and recommended storage conditions.

• Used as a click-chemistry intermediate for ADC linker and bioconjugate synthesis.
• Provides a strained alkyne handle for copper-free SPAAC with azides.
• High purity of 99.7% as reported by manufacturer.
• Molecular weight 319.36 g/mol; formula C20H17NO3.
• Stable as a powder when stored under recommended temperatures.

Medchemexpress LLC Cis-Fmoc-Pro(4-N3)-OH | 263847-08-1 | MFCD04115792 | 99.1% | 378.38 g/mol | C20H18N4O4 | 250 MG

cis-Fmoc-Pro(4-N3)-OH is an Fmoc-protected proline derivative carrying an azide at the 4-position. Supplied as a white to off-white solid, it is intended as a building block for peptide synthesis and for introducing azide functionality for bioorthogonal conjugation via copper-catalyzed azide-alkyne cycloaddition.

• Contains azide functional group for copper-catalyzed azide-alkyne cycloaddition (CuAAC) conjugation.
• Fmoc-protected for compatibility with standard solid-phase peptide synthesis workflows.
• High purity suitable for synthetic and analytical applications.
• Stable as a powder when stored under recommended conditions for long-term use.
• Available in multiple sizes, including small 250 mg quantities for research use.

Medchemexpress LLC 2,5-dioxopyrrolidin-1-yl hept-6-ynoate | 917222-23-2 | MFCD29041721 | 98.0% | 223.23 g/mol | C11H13NO4 | 250 MG

2,5-Dioxopyrrolidin-1-yl hept-6-ynoate is an amine-reactive N-hydroxysuccinimide (NHS) ester bearing a terminal alkyne. It enables selective derivatization of primary amines on peptides, proteins, antibodies, and amine-coated surfaces and facilitates copper-catalyzed azide-alkyne cycloaddition (Click Chemistry) for bioconjugation workflows.

• Amine-reactive N-hydroxysuccinimide (NHS) ester for selective labeling of primary amines.
• Terminal alkyne enables copper-catalyzed azide-alkyne cycloaddition (Click Chemistry).
• Suitable for peptides, proteins, antibodies, and amine-coated surfaces.
• Available in small laboratory pack sizes for method development and optimization.
• Recommended storage under cool, inert conditions to maintain stability.

Medchemexpress LLC Ethyl 3-azidopropanoate | 40139-55-7 | MFCD24452394 | >95.0% | 143.14 g·mol⁻1 | C5H9N3O2 | 25 MG

Ethyl 3-azidopropanoate is an ethyl ester bearing a terminal azide group used as a building block in organic synthesis and click-chemistry applications. The azide functionality readily undergoes cycloaddition with alkynes to form stable triazole linkages, enabling modular assembly and bioconjugation.

• Azide-functional ethyl ester for click chemistry.
• Reacts in copper-catalyzed and strain-promoted cycloadditions to yield triazoles.
• High purity (≥95.0%) suitable for synthetic applications.
• Liquid, colorless to light yellow, facilitating handling and dosing.
• Recommended storage: pure form -20°C (3 years) or 4°C (2 years); in solvent -80°C (6 months).
• Supplied as a 25 mg aliquot for small-scale synthesis and screening.

Medchemexpress LLC 2,5-dioxopyrrolidin-1-yl 2-(prop-2-yn-1-yloxy)acetate | 1858242-47-3 | MFCD29067173 | >98.0% | 211.17 g·mol⁻¹ | C9H9NO5 | 250 MG

2,5-Dioxopyrrolidin-1-yl 2-(prop-2-yn-1-yloxy)acetate is an N-hydroxysuccinimide (NHS) ester bearing a propargyl (alkyne) handle. It is used to introduce terminal alkyne functionality onto amine-containing molecules via NHS-ester coupling for downstream click chemistry and bioconjugation workflows. Reported purity is >98% and common pack sizes include 250 mg.

• Provides a propargyl handle for copper-catalyzed azide-alkyne cycloaddition (click chemistry).
• Reacts readily with primary amines through NHS-ester-mediated amide bond formation.
• High reported purity supports reliable conjugation and analytical reproducibility.
• Available in small pack sizes suitable for preparative and research use.
• Stable when stored under recommended conditions for reagent-grade NHS esters.