Exact Mass: 268.1059

Exact Mass Matches: 268.1059

Found 500 metabolites which its exact mass value is equals to given mass value 268.1059, within given mass tolerance error 0.05 dalton. Try search metabolite list with more accurate mass tolerance error 0.01 dalton.

3-Hydroxybenzo(a)pyrene

pentacyclo[10.6.2.0²,⁷.0⁹,¹⁹.0¹⁶,²⁰]icosa-1(18),2,4,6,8,10,12,14,16,19-decaen-13-ol

C20H12O (268.0888)

CONFIDENCE standard compound; INTERNAL_ID 45

Pentostatin

(8R)-3-[(2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-3H,6H,7H,8H-imidazo[4,5-d][1,3]diazepin-8-ol

C11H16N4O4 (268.1171)

Pentostatin is only found in individuals that have used or taken this drug. It is a potent inhibitor of adenosine deaminase. The drug is effective in the treatment of many lymphoproliferative malignancies, particularly hairy-cell leukemia. It is also synergistic with some other antineoplastic agents and has immunosuppressive activity. [PubChem]Pentostatin is a potent transition state inhibitor of adenosine deaminase (ADA), the greatest activity of which is found in cells of the lymphoid system. T-cells have higher ADA activity than B-cells, and T-cell malignancies have higher activity than B-cell malignancies. The cytotoxicity that results from prevention of catabolism of adenosine or deoxyadenosine is thought to be due to elevated intracellular levels of dATP, which can block DNA synthesis through inhibition of ribonucleotide reductase. Intracellular activation results in incorporation into DNA as a false purine base. An additional cytotoxic effect is related to its incorporation into RNA. Cytotoxicity is cell cycle phase-specific (S-phase). D000970 - Antineoplastic Agents > D000903 - Antibiotics, Antineoplastic > D005573 - Formycins L - Antineoplastic and immunomodulating agents > L01 - Antineoplastic agents D004791 - Enzyme Inhibitors > D058892 - Adenosine Deaminase Inhibitors C471 - Enzyme Inhibitor > C2157 - Adenosine Deaminase Inhibitor

Lysergic acid

6-Methyl-9,10-didehydroergoline-8-carboxylic acid

C16H16N2O2 (268.1212)

An ergoline alkaloid comprising 6-methylergoline having additional unsaturation at the 9,10-position and a carboxy group at the 8-position.

8-Azaadenosine

C9H12N6O4 (268.092)

Pifithrin-Beta

2-p-Tolyl-5,6,7,8-tetrahydrobenzo[d]imidazo[2,1-b]thiazole

C16H16N2S (268.1034)

Saphenic acid

6-[(1R)-1-hydroxyethyl]phenazine-1-carboxylic acid

C15H12N2O3 (268.0848)

Nbbcc

butyl 9H-pyrido[3,4-b]indole-3-carboxylate

C16H16N2O2 (268.1212)

N-Butyl-beta-carboline-3-carboxylate is a member of beta-carbolines.

2-Hydroxybenzo(a)pyrene

C20H12O (268.0888)

3-Methylcholanthrene

16-methylpentacyclo[11.6.1.0²,¹¹.0⁵,¹⁰.0¹⁷,²⁰]icosa-1,3,5,7,9,11,13(20),14,16-nonaene

C21H16 (268.1252)

9-Hydroxybenzo[a]pyrene

pentacyclo[10.6.2.0^{2,7}.0^{9,19}.0^{16,20}]icosa-1,3,5,7,9(19),10,12(20),13,15,17-decaen-4-ol

C20H12O (268.0888)

9-Hydroxybenzo[a]pyrene, also known as benzo[Def]chrysen-9-ol or 9-hydroxybenzo(a)Pyrene, 3H-labeled, is classified as a member of the Benzopyrenes. Benzopyrenes are organic compounds containing a benzene fused to a pyrene(benzo[def]phenanthrene) ring system. 9-Hydroxybenzo[a]pyrene is considered to be practically insoluble (in water) and acidic

Benzo[a]pyrene-9,10-oxide

4-oxahexacyclo[11.6.2.0²,⁸.0³,⁵.0¹⁰,²⁰.0¹⁷,²¹]henicosa-1(20),2(8),6,9,11,13(21),14,16,18-nonaene

C20H12O (268.0888)

This compound belongs to the family of Pyrenes. These are compounds containing a pyrene moiety, which consists four fused benzene rings, resulting in a flat aromatic system.

Benzo[a]pyrene-7,8-oxide

6-oxahexacyclo[11.6.2.0²,⁸.0⁵,⁷.0¹⁰,²⁰.0¹⁷,²¹]henicosa-1,3,8,10(20),11,13(21),14,16,18-nonaene

C20H12O (268.0888)

This compound belongs to the family of Pyrenes. These are compounds containing a pyrene moiety, which consists four fused benzene rings, resulting in a flat aromatic system.

Benzo[a]pyrene-4,5-oxide

18-oxahexacyclo[10.7.2.0³,⁸.0⁹,²⁰.0¹⁶,²¹.0¹⁷,¹⁹]henicosa-1,3,5,7,9(20),10,12(21),13,15-nonaene

C20H12O (268.0888)

This compound belongs to the family of Chrysenes. These are compounds containing the polyaromatic chrysene moiety, which consists of a benzene ring fused to a phenanthrene ring system to form Benzo[a]phenanthrene. D009676 - Noxae > D002273 - Carcinogens

2,3-Dihydroxycarbamazepine

5,6-dihydroxy-2-azatricyclo[9.4.0.0³,⁸]pentadeca-1(15),3,5,7,9,11,13-heptaene-2-carboxamide

C15H12N2O3 (268.0848)

2,3-Dihydroxycarbamazepine is a metabolite of carbamazepine. Carbamazepine (CBZ) is an anticonvulsant and mood-stabilizing drug used primarily in the treatment of epilepsy and bipolar disorder, as well as trigeminal neuralgia. (Wikipedia)

Benzo[a]pyrene-11,12-epoxide

C20H12O (268.0888)

N,N-Diacetylbenzidine

C16H16N2O2 (268.1212)

DISPERSE BLUE 1

1,4,5,8-Tetraamino-9,10-anthracenedione

C14H12N4O2 (268.096)

D004396 - Coloring Agents

5,6-Cyclopenteno-1,2-benzanthracene

2,3-Dihydro-1H-benzo[a]cyclopent[h]anthracene

C21H16 (268.1252)

Musk ambrette

1-(1,1-Dimethylethyl)-2-methoxy-4-methylbenzene nitrated

C12H16N2O5 (268.1059)

D009676 - Noxae > D009153 - Mutagens

Razoxane

C11H16N4O4 (268.1171)

D000890 - Anti-Infective Agents > D000900 - Anti-Bacterial Agents > D054659 - Diketopiperazines D000970 - Antineoplastic Agents > D050256 - Antimitotic Agents D050258 - Mitosis Modulators

N-acetylcarnosine

(2R)-2-({1-hydroxy-3-[(1-hydroxyethylidene)amino]propylidene}amino)-3-(1H-imidazol-5-yl)propanoate

C11H16N4O4 (268.1171)

N-Acetylcarnosine (NAC) is a naturally-occurring compound chemically related to the dipeptide carnosine. Its molecular structure is similar to carnosine with the exception that it carries an additional acetyl group. This makes NAC a more stable molecule which is not easily destroyed by carnosinase, an enzyme that breaks down carnosine to its constituent amino acids, beta-alanine and histidine.; NAC is a free-radical scavenger and is particularly active against lipid peroxidation in the different parts of the lens in the eye. It is the active ingredient of eye drops used in order to prevent or treat cataract. [HMDB] N-Acetylcarnosine (NAC) is a naturally-occurring compound chemically related to the dipeptide carnosine. Its molecular structure is similar to carnosine with the exception that it carries an additional acetyl group. This makes NAC a more stable molecule which is not easily destroyed by carnosinase, an enzyme that breaks down carnosine to its constituent amino acids, beta-alanine and histidine. NAC is a free-radical scavenger and is particularly active against lipid peroxidation in the different parts of the lens in the eye. It is the active ingredient of eye drops used in order to prevent or treat cataract. N-Acetylcarnosine, a natural histidine-containing dipeptide, is a source of pharmacological principal L-carnosine. N-Acetylcarnosine is a potent ophthalmic agent in human cataracts[1].

Moclobemide

4-chloro-N-[2-(morpholin-4-yl)ethyl]benzamide

C13H17ClN2O2 (268.0978)

Moclobemide is only found in individuals that have used or taken this drug. It is a reversible monoamine oxidase inhibitor (MAOI) selective for isoform A (RIMA) used to treat major depressive disorder.The mechanism of action of moclobemide involves the selective, reversible inhibition of MAO-A. This inhibition leads to a decrease in the metabolism and destruction of monoamines in the neurotransmitters. This results in an increase in the monoamines, relieving depressive symptoms. N - Nervous system > N06 - Psychoanaleptics > N06A - Antidepressants > N06AG - Monoamine oxidase a inhibitors D002491 - Central Nervous System Agents > D011619 - Psychotropic Drugs > D000928 - Antidepressive Agents D004791 - Enzyme Inhibitors > D008996 - Monoamine Oxidase Inhibitors C471 - Enzyme Inhibitor > C667 - Monoamine Oxidase Inhibitor

4-Hydroxyphenytoin

2,4-Imidazolidinedione,5-(4-hydroxyphenyl)-5-phenyl-

C15H12N2O3 (268.0848)

4-Hydroxyphenytoin, also known as hydroxyphenytoin or 4-HPPH, belongs to the class of organic compounds known as phenylhydantoins. These are heterocyclic aromatic compounds containing an imiazolidinedione moiety substituted by a phenyl group. 4-Hydroxyphenytoin is a metabolite of the anti-seizure medication phenytoin (PHT) and is excreted in the urine (PMID: 15855726).

Cysteinyl-Phenylalanine

2-[(2-Amino-1-hydroxy-3-sulphanylpropylidene)amino]-3-phenylpropanoic acid

C12H16N2O3S (268.0882)

Cysteinyl-Phenylalanine is a dipeptide composed of cysteine and phenylalanine. It is an incomplete breakdown product of protein digestion or protein catabolism. Some dipeptides are known to have physiological or cell-signaling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis. This dipeptide has not yet been identified in human tissues or biofluids and so it is classified as an Expected metabolite.

Phenylalanylcysteine

(2R)-2-[(2S)-2-amino-3-phenylpropanamido]-3-sulfanylpropanoic acid

C12H16N2O3S (268.0882)

Phenylalanylcysteine is a dipeptide composed of phenylalanine and cysteine. It is an incomplete breakdown product of protein digestion or protein catabolism. Dipeptides are organic compounds containing a sequence of exactly two alpha-amino acids joined by a peptide bond. Some dipeptides are known to have physiological or cell-signalling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis.

Dexrazoxane

4-[(2S)-2-(3,5-dioxopiperazin-1-yl)propyl]piperazine-2,6-dione

C11H16N4O4 (268.1171)

An antimitotic agent with immunosuppressive properties. Dexrazoxane, the (+)-enantiomorph of razoxane, provides cardioprotection against anthracycline toxicity. It appears to inhibit formation of a toxic iron-anthracycline complex. [PubChem]. The Food and Drug Administration has designated dexrazoxane as an orphan drug for use in the prevention or reduction in the incidence and severity of anthracycline-induced cardiomyopathy. V - Various > V03 - All other therapeutic products > V03A - All other therapeutic products > V03AF - Detoxifying agents for antineoplastic treatment D000970 - Antineoplastic Agents > D059003 - Topoisomerase Inhibitors > D059005 - Topoisomerase II Inhibitors D000890 - Anti-Infective Agents > D000900 - Anti-Bacterial Agents > D054659 - Diketopiperazines D000970 - Antineoplastic Agents > D050256 - Antimitotic Agents D020011 - Protective Agents > D002316 - Cardiotonic Agents D002317 - Cardiovascular Agents D050258 - Mitosis Modulators D004791 - Enzyme Inhibitors

Seryltyrosine

(2S)-2-[(2S)-2-amino-3-hydroxypropanamido]-3-(4-hydroxyphenyl)propanoic acid

C12H16N2O5 (268.1059)

Seryltyrosine is a dipeptide composed of serine and tyrosine. It is an incomplete breakdown product of protein digestion or protein catabolism. Some dipeptides are known to have physiological or cell-signaling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis.

Tyrosyl-Serine

2-{[2-amino-1-hydroxy-3-(4-hydroxyphenyl)propylidene]amino}-3-hydroxypropanoate

C12H16N2O5 (268.1059)

Tyrosyl-Serine is a dipeptide composed of tyrosine and serine. It is an incomplete breakdown product of protein digestion or protein catabolism. Some dipeptides are known to have physiological or cell-signaling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis. This dipeptide has not yet been identified in human tissues or biofluids and so it is classified as an Expected metabolite.

3'-HPPH

(5R)-5-(3-hydroxyphenyl)-5-phenylimidazolidine-2,4-dione

C15H12N2O3 (268.0848)

3-HPPH, also called (5R)-5-(3-hydroxyphenyl)-5-phenylimidazolidine-2,4-dione or 3’-hydroxyphenytoin, is a metabolite of Phenytoin. Phenytoin is an anticonvulsant used to treat epilepsy. 3-HPPH belongs to the family of compounds known as Diphenylmethanes. These are compounds containing a diphenylmethane moiety, which consists of a methane wherein two hydrogen atoms are replaced by two phenyl groups. 3-HPPH or 3’-hydroxyphenytoin is only found in individuals that have used or taken Phenytoin.

Hydroxyprolyl-Histidine

2-{[hydroxy(4-hydroxypyrrolidin-2-yl)methylidene]amino}-3-(1H-imidazol-5-yl)propanoate

C11H16N4O4 (268.1171)

Hydroxyprolyl-Histidine is a dipeptide composed of hydroxyproline and histidine. It is an incomplete breakdown product of protein digestion or protein catabolism. Some dipeptides are known to have physiological or cell-signaling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis. This dipeptide has not yet been identified in human tissues or biofluids and so it is classified as an Expected metabolite.

Histidylhydroxyproline

(2S,4R)-1-[(2S)-2-amino-3-(1H-imidazol-4-yl)propanoyl]-4-hydroxypyrrolidine-2-carboxylic acid

C11H16N4O4 (268.1171)

Histidinylhydroxyproline is a dipeptide composed of histidine and hydroxyproline. It is an incomplete breakdown product of protein digestion or protein catabolism. Some dipeptides are known to have physiological or cell-signaling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis.

Eugenyl benzoate

Phenol, 2-methoxy-4-(2-propen-1-yl)-, 1-benzoate