Exact Mass: 152.031

Xanthine, also known as 2,6-dioxopurine, belongs to the class of organic compounds known as xanthines. These are purine derivatives with a ketone group conjugated at carbons 2 and 6 of the purine moiety. Xanthine is also classified as an oxopurine. An oxopurine in which the purine ring is substituted by oxo groups at positions 2 and 6 and N-9 is protonated. Xanthine exists in all living species, ranging from bacteria to plants to humans. In plants, several stimulants can be derived from xanthine, including caffeine, theophylline, and theobromine. Derivatives of xanthine (known collectively as xanthines) are a group of alkaloids commonly used for their effects as mild stimulants and as bronchodilators, notably in the treatment of asthma or influenza symptoms. Within humans, xanthine participates in a number of enzymatic reactions. In particular, xanthine can be biosynthesized from guanine; which is mediated by the enzyme guanine deaminase. In addition, xanthine and ribose 1-phosphate can be biosynthesized from xanthosine through the action of the enzyme purine nucleoside phosphorylase. In humans and other primates, xanthine can be converted to uric acid by the action of the xanthine oxidase enzyme. People with rare genetic disorders, specifically xanthinuria and Lesch‚ÄìNyhan syndrome, lack sufficient xanthine oxidase and cannot convert xanthine to uric acid. Individuals with xanthinuria have unusually high concentrations of xanthine in their blood and urine, which can lead to health problems such as renal failure and xanthine kidney stones. Individuals with Lesch-Nyhan syndrome have a deficiency of the enzyme hypoxanthine-guanine phosphoribosyltransferase (HGPRT). The HGPRT deficiency causes a build-up of uric acid in all body fluids. This results in both high levels of uric acid in the blood and urine, associated with severe gout and kidney problems. Neurological signs include poor muscle control and moderate intellectual disability. 9H-xanthine is an oxopurine in which the purine ring is substituted by oxo groups at positions 2 and 6 and N-9 is protonated. It has a role as a Saccharomyces cerevisiae metabolite. It is a tautomer of a 7H-xanthine. A purine base found in most body tissues and fluids, certain plants, and some urinary calculi. It is an intermediate in the degradation of adenosine monophosphate to uric acid, being formed by oxidation of hypoxanthine. The methylated xanthine compounds caffeine, theobromine, and theophylline and their derivatives are used in medicine for their bronchodilator effects. (Dorland, 28th ed) Xanthine is a metabolite found in or produced by Escherichia coli (strain K12, MG1655). Xanthine is a natural product found in Beta vulgaris, Camellia sinensis var. assamica, and other organisms with data available. Xanthine is a purine base found in most body tissues and fluids, certain plants, and some urinary calculi. It is an intermediate in the degradation of adenosine monophosphate to uric acid, being formed by oxidation of hypoxanthine. The methylated xanthine compounds caffeine, theobromine, and theophylline and their derivatives are used in medicine for their bronchodilator effects. (Dorland, 28th ed.). Xanthine is a metabolite found in or produced by Saccharomyces cerevisiae. A purine base found in most body tissues and fluids, certain plants, and some urinary calculi. It is an intermediate in the degradation of adenosine monophosphate to uric acid, being formed by oxidation of hypoxanthine. The methylated xanthine compounds caffeine, theobromine, and theophylline and their derivatives are used in medicine for their bronchodilator effects. (Dorland, 28th ed) An oxopurine in which the purine ring is substituted by oxo groups at positions 2 and 6 and N-9 is protonated. Xanthine, a plant alkaloid found in tea, coffee, and cocoa, is a mild stimulant of the central nervous system. Xanthine also acts as an intermediate product on the pathway of purine degradation[1][2][3]. Xanthine, a plant alkaloid found in tea, coffee, and cocoa, is a mild stimulant of the central nervous system. Xanthine also acts as an intermediate product on the pathway of purine degradation[1][2][3]. Xanthine, a plant alkaloid found in tea, coffee, and cocoa, is a mild stimulant of the central nervous system. Xanthine also acts as an intermediate product on the pathway of purine degradation[1][2][3].

Oxypurinol

1H,2H,4H,5H,6H-pyrazolo[3,4-d]pyrimidine-4,6-dione

Oxipurinol is a xanthine oxidase inhibitor. Oxipurinol is potentially used for treatment of congestive heart failure. PMID: 15139781. Oxipurinol is a xanthine oxidase inhibitor. Oxipurinol is potentially used for treatment of congestive heart failure. C471 - Enzyme Inhibitor > C1637 - Xanthine Oxidase Inhibitor D004791 - Enzyme Inhibitors CONFIDENCE standard compound; INTERNAL_ID 864; DATASET 20200303_ENTACT_RP_MIX500; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 855; ORIGINAL_PRECURSOR_SCAN_NO 853 CONFIDENCE standard compound; INTERNAL_ID 864; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 883; ORIGINAL_PRECURSOR_SCAN_NO 881 CONFIDENCE standard compound; INTERNAL_ID 864; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 893; ORIGINAL_PRECURSOR_SCAN_NO 892 CONFIDENCE standard compound; INTERNAL_ID 864; DATASET 20200303_ENTACT_RP_MIX500; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 861; ORIGINAL_PRECURSOR_SCAN_NO 860 CONFIDENCE standard compound; INTERNAL_ID 864; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 894; ORIGINAL_PRECURSOR_SCAN_NO 892 Acquisition and generation of the data is financially supported in part by CREST/JST. Oxipurinol (Oxipurinol), the major active metabolite of Allopurinol, is an inhibitor of xanthine oxidase. Oxipurinol can be used to regulate blood urate levels and treat gout[1].

5,7-Dihydro-2-methylthieno[3,4-d]pyrimidine

6,8-Dihydroxypurine

6,7,8,9-tetrahydro-3H-purine-6,8-dione

6,8-Dihydroxypurine is an endogenous nucleoside found in human fluids. Purine bases are present in higher amounts in tumor-bearing patients compared to healthy controls. DNA hypermethylation is a common finding in malignant cells and has been explored as a therapeutic target for hypomethylating agents. When chemical bonds to DNA, the DNA becomes damaged and proper and complete replication cannot occur to make the normal intended cell. A DNA adduct is an abnormal piece of DNA covalently-bonded to a cancer-causing chemical. This has shown to be the start of a cancerous cell, or carcinogenesis. DNA adducts in scientific experiments are used as bio-markers and as such are themselves measured to reflect quantitatively, for comparison, the amount of cancer in the subject. (PMID: 3506820, 17044778, 17264127, 16799933).

S-Methyl benzenecarbothioate

Benzenecarbothioic acid, S-methyl ester

C8H8OS (152.0296)

S-Methyl benzenecarbothioate is a flavouring agent for food Flavouring agent for foods

5,7-Dihydro-2-methylthieno[3,4-d]pyrimidine

5,7-dihydro-2-Methyl-thieno(3,4-D)pyrimidine

Cystine-derived Maillard produced 5,7-Dihydro-2-methylthieno[3,4-d]pyrimidine is a flavouring ingredient. Sweetness enhancer at low concentration (10 ppm), at higher concentration enhances root vegetable flavour in chicken broth base. Cystine-derived Maillard production Flavouring ingredient. Sweetness enhancer at low conc. (10 ppm), at higher conc. enhances root vegetable flavour in chicken broth base

2-(Allylthio)pyrazine

2-(prop-2-en-1-ylsulfanyl)pyrazine

D004791 - Enzyme Inhibitors > D065607 - Cytochrome P-450 Enzyme Inhibitors > D065691 - Cytochrome P-450 CYP2E1 Inhibitors

Phenylthiourea

alpha-Phenylthiourea

S-Phenyl thioacetate

1-(Phenylsulphanyl)ethan-1-one

C8H8OS (152.0296)

Xanthine

COVID info from COVID-19 Disease Map, PDB, Protein Data Bank Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS Xanthine, a plant alkaloid found in tea, coffee, and cocoa, is a mild stimulant of the central nervous system. Xanthine also acts as an intermediate product on the pathway of purine degradation[1][2][3]. Xanthine, a plant alkaloid found in tea, coffee, and cocoa, is a mild stimulant of the central nervous system. Xanthine also acts as an intermediate product on the pathway of purine degradation[1][2][3]. Xanthine, a plant alkaloid found in tea, coffee, and cocoa, is a mild stimulant of the central nervous system. Xanthine also acts as an intermediate product on the pathway of purine degradation[1][2][3].

COVID info from COVID-19 Disease Map, PDB, Protein Data Bank Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS MS2 deconvoluted using MS2Dec from all ion fragmentation data, MetaboLights identifier MTBLS1040; LRFVTYWOQMYALW_STSL_0180_Xanthine_0500fmol_180506_S2_LC02_MS02_265; Spectrum acquired as described in Naz et al 2017 PMID 28641411. Preparation and submission to MassBank of North America by Chaleckis R. and Tada I. MS2 deconvoluted using CorrDec from all ion fragmentation data, MetaboLights identifier MTBLS1040; Spectrum acquired as described in Naz et al 2017 PMID 28641411. Preparation and submission to MassBank of North America by Chaleckis R. and Tada I. Xanthine, a plant alkaloid found in tea, coffee, and cocoa, is a mild stimulant of the central nervous system. Xanthine also acts as an intermediate product on the pathway of purine degradation[1][2][3]. Xanthine, a plant alkaloid found in tea, coffee, and cocoa, is a mild stimulant of the central nervous system. Xanthine also acts as an intermediate product on the pathway of purine degradation[1][2][3]. Xanthine, a plant alkaloid found in tea, coffee, and cocoa, is a mild stimulant of the central nervous system. Xanthine also acts as an intermediate product on the pathway of purine degradation[1][2][3].

Oxipurinol

1H-Pyrazolo[3,4-d]pyrimidine-4,6(2H,5H)-dione

C471 - Enzyme Inhibitor > C1637 - Xanthine Oxidase Inhibitor D004791 - Enzyme Inhibitors Oxipurinol (Oxipurinol), the major active metabolite of Allopurinol, is an inhibitor of xanthine oxidase. Oxipurinol can be used to regulate blood urate levels and treat gout[1].

Xanthine (not validated)

Annotation level-2

Phenylthiocarbamide

1-Phenyl-2-thiourea

Methyl thiobenzoate

Benzenecarbothioic acid, S-methyl ester

C8H8OS (152.0296)

FEMA 3338

S-Phenyl thioacetate

5-chloro-2,3-dihydro-1H-indene

C9H9Cl (152.0393)

Methyl 4,4-difluoro-3-oxobutanoate

C5H6F2O3 (152.0285)

4-Amino-2-hydroxybenzoate

2-(Pyridin-2-yl)ethanethioamide

Hypoxanthine 3-N-oxide

An oxopurine that is 3,9-dihydro-6H-purine which is substituted by an oxo group at position 6 and in which the hydrogen attached to the nitrogen at position 3 is replaced by a hydroxy group. It is a major component of Schreckstoff, an alarm pheromone found in fish.

Trimethylsilyl methanesulfinate

C4H12O2SSi (152.0327)

Xanthin

1-H-purine-2,6-dione, 3,7-dihydro(9CI)

3-Amino-4-hydroxybenzoate

3-Amino-5-hydroxybenzoate

2-Amino-3-hydroxybenzoate

COVID info from COVID-19 Disease Map Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS

5-Aminosalicylate

D000893 - Anti-Inflammatory Agents > D000894 - Anti-Inflammatory Agents, Non-Steroidal > D012459 - Salicylates D018373 - Peripheral Nervous System Agents > D018689 - Sensory System Agents D002491 - Central Nervous System Agents > D000700 - Analgesics D018501 - Antirheumatic Agents

5-Hydroxyanthranilate

(5R)-Carbapenem-3-carboxylate