Imidazopyrimidines

Sigma Aldrich Fine Chemicals Biosciences 3-Isobutyl-1-methylxanthine BioUltra, 99, 28822-58-4, MFCD00005584

3-Isobutyl-1-methylxanthine BioUltra, 99

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eMolecules​ ChemScene / 4-((23-Dihydroxypropyl)thio)butanoic acid / 100mg / 712787328 / CS-0227129 / 0.000 / 1532897-60-1 / MFCD23743665 / 194.250 / C7H14O4S

ChemScene / 4-((23-Dihydroxypropyl)thio)butanoic acid / 100mg / 712787328 / CS-0227129 / 0.000 / 1532897-60-1 / MFCD23743665 / 194.250 / C7H14O4S

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Sigma Aldrich Fine Chemicals Biosciences Nicotinic acid adenine din25MG

Nicotinic acid adenine dinucleotide (deamido-NAD NAAD) is a closely related analog of NAD. It is used to study the structure of nicotinate mononucleotide adenylyltransferase(s) (NMN/NaMN). NAAD is used as a substrate to study the specificity and kinetics of nicotinamide adenine dinucleotide synthetase(s) (NADS). In addition it is also used as a co-substrate to study mechanisms of members of the Sir2 class of NAD-dependent deacetylase.

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Sigma Aldrich Fine Chemicals Biosciences Caffeine powder ReagentPlu500G

Caffeine is a widely ingested pharmacologically active substance. It belongs to the class of methylxanthines. It is a naturally occurring alkaloid found in coffee cocoa and other plants. Caffeine might be associated with osteoporosis cardiovascular risk arrhythmia and gastrointestinal disturbances. Caffeine is used to treat orthostatic hypotension bronchopulmonary dysplasia and apnea of prematurity (AOP).

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Sigma Aldrich Fine Chemicals Biosciences Xanthine 9910G

Xanthine is synthesized from guanine in the presence of guanine deaminase. Xanthine oxidase catalyzes the production of xanthine from hypoxanthine and its subsequent breakdown to uric acid. Xanthine derivatives are present in coffee tea and cocoa seeds. Xanthine has been proposed as a lead for the generation of pharmacologically active compounds.

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Sigma Aldrich Fine Chemicals Biosciences 3-Acetylpyridine adenine d25MG

adenine 3-Acetylpyridine adenine d25MG

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Sigma Aldrich Fine Chemicals Biosciences Pentoxifylline | 6493-05-6 | MFCD00063379 | 10g

Pentoxifylline | Purity: | MW: 278.31 | 6493-05-6 | MFCD00063379 | 10g

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Medchemexpress LLC Xanthine | 69-89-6 | MFCD00078453 | 99.1% | 152.11 g/mol | C5H4N4O2 | 250 MG

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Xanthine (Standard) is an analytical reference standard of xanthine (CAS 69-89-6) intended for research and analytical applications. Xanthine is a plant alkaloid and an intermediate in purine degradation. This high-purity solid is provided for use in method development, calibration, and quality control of analytical assays.

• High purity (99.09%).
• Molecular formula C5H4N4O2.
• Molecular weight 152.11 g/mol.
• Provided as a stable solid suitable for analytical work.
• Suitable for calibration, method development, and quality control.
• Available in 250 mg pack size.

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Sigma Aldrich Fine Chemicals Biosciences 3-Isobutyl-1-methylxanthine 99 (HPLC), powder, 28822-58-4, MFCD00005584

3-Isobutyl-1-methylxanthine 99 (HPLC), powder

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eMolecules​ 69-93-2 | 2,3,6,7,8,9-Hexahydro-1H-purine-2,6,8-trione | Combi-Blocks | MFCD00005712 | 168.112 | C5H4N4O3 | 98.000 | O=c1[nH]c2[nH]c(=O)[nH]c(=O)c2[nH]1 | 25g | 290701256

2,3,6,7,8,9-Hexahydro-1H-purine-2,6,8-trione | Combi-Blocks | 69-93-2 | MFCD00005712 | 168.112 | C5H4N4O3 | 98.000 | O=c1[nH]c2[nH]c(=O)[nH]c(=O)c2[nH]1 | 25g | 290701256

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Sigma Aldrich Fine Chemicals Biosciences Adenine | 73-24-5 | MFCD00041790 | 25g

Adenine | Purity: 99% | MW: 135.13 | 73-24-5 | MFCD00041790 | 25g

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Sigma Aldrich Fine Chemicals Biosciences Xanthine Oxidase microbial

Allopurinol is a synthetic drug show to inhibit xanthine oxidase.

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Chem-Impex International, Inc. 2',3'-O-Isopropylideneadenosine | 362-75-4 | MFCD00005756 | 5G

2',3'-O-Isopropylideneadenosine, 362-75-4, MFCD00005756, 5G

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Chem-Impex International, Inc. Caffeine, anhydrous | 58-08-2 | MFCD00005758 | 100G

Caffeine, anhydrous, 58-08-2, MFCD00005758, 100G

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Medchemexpress LLC 7-methylxanthine-d3 | 1185878-99-2 | 99.3% | 169.16 | C6H3D3N4O2 | 1 MG

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7-Methylxanthine-d3 is a deuterium-labeled isotopic standard of 7-methylxanthine supplied as a high-purity solid for research use. The d3 label provides a predictable mass shift that enables clear differentiation from the unlabeled analyte in mass spectrometry and tracer experiments. Molecular formula: C6H3D3N4O2; molecular weight: 169.16; CAS: 1185878-99-2.

• High purity 99.31% for analytical reliability.
• Deuterium-labeled (d3) for mass-shifted internal standard use.
• Suitable for LC-MS/MS quantitation and tracer studies.
• Available in small package sizes (1 mg, 5 mg, 10 mg) for method development.
• Intended for research use only.

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