Exact Mass: 262.1289

Exact Mass Matches: 262.1289

Found 500 metabolites which its exact mass value is equals to given mass value 262.1289, within given mass tolerance error 0.01 dalton. Try search metabolite list with more accurate mass tolerance error 0.001 dalton.

Methohexital

5-Allyl-1-methyl-5-(1-methyl-2-pentynyl)-2,4,6(1H,3H,5H)-pyrimidinetrione

C14H18N2O3 (262.1317)

Methohexital is only found in individuals that have used or taken this drug. It is an intravenous anesthetic with a short duration of action that may be used for induction of anesthesia. [PubChem]Methohexital binds at a distinct binding site associated with a Cl^- ionopore at the GABA_A receptor, increasing the duration of time for which the Cl^- ionopore is open. The post-synaptic inhibitory effect of GABA in the thalamus is, therefore, prolonged. D002491 - Central Nervous System Agents > D002492 - Central Nervous System Depressants > D000777 - Anesthetics N - Nervous system > N05 - Psycholeptics > N05C - Hypnotics and sedatives > N05CA - Barbiturates, plain N - Nervous system > N01 - Anesthetics > N01A - Anesthetics, general > N01AF - Barbiturates, plain C78272 - Agent Affecting Nervous System > C29756 - Sedative and Hypnotic > C67084 - Barbiturate

Physovenine

N-methylcarbamic acid [(3aS,8bS)-4,8b-dimethyl-2,3a-dihydro-1H-furo[2,3-b]indol-7-yl] ester

C14H18N2O3 (262.1317)

Fat Brown RR

4-[2-(1-Naphthalenyl)diazenyl]-1,3-benzenediamine

C16H14N4 (262.1218)

Alnustone

InChI=1/C19H18O/c20-19(16-15-18-11-5-2-6-12-18)14-8-7-13-17-9-3-1-4-10-17/h1-14H,15-16H2/b13-7+,14-8

C19H18O (262.1358)

Alnustone belongs to the class of organic compounds known as linear diarylheptanoids. These are diarylheptanoids with an open heptane chain. Alnustone is found in herbs and spices. Alnustone is a constituent of Curcuma xanthorrhiza (Java turmeric). Alnustone is a diarylheptanoid. Alnustone is a natural product found in Alnus pendula, Alpinia hainanensis, and other organisms with data available. Alnustone, a non-phenolic diarylheptanoid found in herbs and spices, is a constituent of Alpiniae Katsumada. Alnustone displays anti-emetic and anti-inflammatory activities[1][2]. Alnustone, a non-phenolic diarylheptanoid found in herbs and spices, is a constituent of Alpiniae Katsumada. Alnustone displays anti-emetic and anti-inflammatory activities[1][2].

Prolylphenylalanine

(2S)-3-phenyl-2-{[(2S)-pyrrolidin-2-yl]formamido}propanoic acid

C14H18N2O3 (262.1317)

Prolylphenylalanine is a dipeptide composed of proline 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. It is found in urine (PMID: 3782411).

Isoleucyl-Methionine

2-[(2-Amino-1-hydroxy-3-methylpentylidene)amino]-4-(methylsulphanyl)butanoic acid

C11H22N2O3S (262.1351)

Isoleucyl-Methionine is a dipeptide composed of isoleucine and methionine. 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.

Methionyl-Isoleucine

2-{[2-amino-1-hydroxy-4-(methylsulphanyl)butylidene]amino}-3-methylpentanoic acid

C11H22N2O3S (262.1351)

Methionyl-Isoleucine is a dipeptide composed of methionine and isoleucine. 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.

Phenylalanylproline

(2S)-1-[(2S)-2-amino-3-phenylpropanoyl]pyrrolidine-2-carboxylic acid

C14H18N2O3 (262.1317)

Phenylalanylproline is a dipeptide composed of phenylalanine and proline. 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. It is found in urine (PMID: 3782411).

Methylmalonylcarnitine

(2R)-3-{[(2R)-1-carboxy-3-(trimethylazaniumyl)propan-2-yl]oxy}-2-methyl-3-oxopropanoic acid

C11H20NO6 (262.1291)

Methylmalonylcarnitine is an acylcarnitine. More specifically, it is an methylmalonic acid ester of carnitine. Acylcarnitines were first discovered more than 70 year ago (PMID: 13825279). It is believed that there are more than 1000 types of acylcarnitines in the human body. The general role of acylcarnitines is to transport acyl-groups (organic acids and fatty acids) from the cytoplasm into the mitochondria so that they can be broken down to produce energy. This process is known as beta-oxidation. According to a recent review [Dambrova et al. 2021, Physiological Reviews], acylcarnitines (ACs) can be classified into 9 different categories depending on the type and size of their acyl-group: 1) short-chain ACs; 2) medium-chain ACs; 3) long-chain ACs; 4) very long-chain ACs; 5) hydroxy ACs; 6) branched chain ACs; 7) unsaturated ACs; 8) dicarboxylic ACs and 9) miscellaneous ACs. Short-chain ACs have acyl-groups with two to five carbons (C2-C5), medium-chain ACs have acyl-groups with six to thirteen carbons (C6-C13), long-chain ACs have acyl-groups with fourteen to twenty once carbons (C14-C21) and very long-chain ACs have acyl groups with more than 22 carbons. Methylmalonylcarnitine is therefore classified as a short chain AC. As a short-chain acylcarnitine methylmalonylcarnitine is a member of the most abundant group of carnitines in the body, comprising more than 50\\% of all acylcarnitines quantified in tissues and biofluids (PMID: 31920980). Some short-chain carnitines have been studied as supplements or treatments for a number of diseases, including neurological disorders and inborn errors of metabolism. In particular methylmalonylcarnitine is elevated in the blood or plasma of individuals with methylmalonyl-coa epimerase deficiency/methylmalonic acidemia (PMID: 27699154, PMID: 17279485), familial mediterranean fever (PMID: 29900937), and cobalamin C deficiency (PMID: 25367534). It is also decreased in the blood or plasma of individuals with melanoma (PMID: 30830422) and intracerebral hemorrhage (PMID: 29265114). Methylmalonylcarnitine is elevated in the urine of individuals with methylmalonyl-coa epimerase deficiency/methylmalonic acidemia (PMID: 27699154, PMID: 17279485). Carnitine acetyltransferase (CrAT, EC:2.3.1.7) is responsible for the synthesis of all short-chain and short branched-chain acylcarnitines (PMID: 23485643). The study of acylcarnitines is an active area of research and it is likely that many novel acylcarnitines will be discovered in the coming years. It is also likely that many novel roles in health and disease will be uncovered. An excellent review of the current state of knowledge for acylcarnitines is available at [Dambrova et al. 2021, Physiological Reviews].

Leucyl-Methionine

2-[(2-Amino-1-hydroxy-4-methylpentylidene)amino]-4-(methylsulphanyl)butanoic acid

C11H22N2O3S (262.1351)

Leucyl-Methionine is a dipeptide composed of leucine and methionine. 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.

Methionyl-Leucine

2-{[2-amino-1-hydroxy-4-(methylsulphanyl)butylidene]amino}-4-methylpentanoic acid

C11H22N2O3S (262.1351)

Methionyl-Leucine is a dipeptide composed of methionine and leucine. 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.

Cyclo(Tyr-Val)