Exact Mass: 263.1189
Exact Mass Matches: 263.1189
Found 152 metabolites which its exact mass value is equals to given mass value 263.1189,
within given mass tolerance error 0.01 dalton. Try search metabolite list with more accurate mass tolerance error
0.001 dalton.
desethylzaleplon
desethylzaleplon is a metabolite of zaleplon. Zaleplon (marketed under the brand names Sonata and Starnoc) is a sedative/hypnotic, mainly used for insomnia. It is a nonbenzodiazepine hypnotic from the pyrazolopyrimidine class. In terms of adverse effects zaleplon appears to offer little improvement compared to both benzodiazepines and other non-benzodiazepine Z-drugs. Sonata (US) is manufactured by King Pharm. of Bristol, TN; Starnoc has been discontinued in Canada. (Wikipedia)
Creatine riboside
Creatine riboside is a conjugate between creatine and ribose. It is a novel diagnostic marker for lung cancer that is elevated in the urine of non-small cell lung cancer subjects (PMID: 24736543). Creatine riboside may be a product of both high creatine levels within tumor cells and the characteristic high phosphate flux of cancer cells. Increased mutagenicity of creatine and ribose pyrolysis products in cooked foods has been reported, suggesting a functional role of creatine riboside in tumorigenesis (PMID: 24736543). Creatine riboside is likely not an enzyme-synthesized product as it can be formed spontaneously by mixing creatine with ribose. It can be synthesized in modestly high yields by reacting ribose and creatine in the presence of ammonium bicarbonate and heating the two compounds at 80°C for 10 minutes.
5-Amino-2-[(2-amino-3-carboxypropanoyl)oxyamino]pentanoic acid
2-cis-abscisate
2-cis-abscisate is practically insoluble (in water) and a weakly acidic compound (based on its pKa). 2-cis-abscisate can be found in a number of food items such as common wheat, lemon thyme, black raspberry, and acorn, which makes 2-cis-abscisate a potential biomarker for the consumption of these food products.
(S)-8-acetyl-4-methoxy-9-methyl-6,7,8,9-tetrahydro-[1,3]dioxolo[4,5-h]isoquinoline|N-acetyl-anhalonine|N-Acetylanhalomine
1-ethyl-5-(7-hydroxy-benzo[1,3]dioxol-5-yl)-piperidin-2-one|Campedin|campedine
1-(4-ISOPROPOXY-PHENYL)-5-OXO-PYRROLIDINE-3-CARBOXYLIC ACID
4-HYDROXY-2,5-DIMETHYL-3-(MORPHOLINOMETHYL)-6-OXO-1,3-CYCLOHEXADIENE-1-CARBONITRILE
1-Benzylpyrrolidine-3,4-dicarboxylic acid monomethyl ester
2-(2-formylphenoxy)-N-(oxolan-2-ylmethyl)acetamide
(s)-piperidine-1,3-dicarboxylic acid 1-benzyl ester
METHYL 6-HYDROXY-7-(1-METHYLALLYL)-5-OXO-1,2,3,5-TETRAHYDROINDOLIZINE-8-CARBOXYLATE
(S)-1-Benzyl 3-Methyl pyrrolidine-1,3-dicarboxylate
Methyl 1-(4-methoxybenzyl)-5-oxo-3-pyrrolidinecarboxylate
1,3-dimethyl-5-[2-(1-methylpyrrolidin-2-ylidene)ethylidene]-1,3-diazinane-2,4,6-trione
1-BENZYL 2-METHYL 2-METHYLPYRROLIDINE-1,2-DICARBOXYLATE
TRANS-4-(1,1-DIMETHYLETHYLSULFONAMIDO)CYCLOHEXANECARBOXYLIC ACID
(S)-1-Benzyl 2-methyl pyrrolidine-1,2-dicarboxylate
2-(1-(Benzyloxycarbonyl)pyrrolidin-2-yl)acetic acid
Benzyl 1,4-dioxa-7-azaspiro[4.4]nonane-7-carboxylate
4-ethyl-3-[(4-ethylphenoxy)methyl]-1H-1,2,4-triazole-5-thione
tert-Butyl (3-oxo-1,2,3,4-tetrahydroquinoxalin-6-yl)carbamate
1-(2,2-DIMETHOXY-ETHYL)-4-ETHYL-1H-INDOLE-2,3-DIONE
(R)-Benzyl 4-formyl-2,2-dimethyloxazolidine-3-carboxylate
tert-butyl 3-amino-4-methoxyindazole-1-carboxylate
6-AMINO-5-OXO-[1,4]DIAZEPANE-1-CARBOXYLICACIDBENZYLESTER
(S)-1-(TERT-BUTOXYCARBONYL)INDOLINE-2-CARBOXYLIC ACID
2-(tert-Butoxycarbonyl)isoindoline-1-carboxylicacid
5-(TERT-BUTYL)-3,3-DIMETHYL-6-NITROBENZOFURAN-2(3H)-ONE
2-[(2-methylpropan-2-yl)oxycarbonyl]-1,3-dihydroisoindole-5-carboxylic acid
1-(4-METHOXY-BENZOYL)-PIPERIDINE-4-CARBOXYLIC ACID
Propanedioic acid,2-[(phenylamino)methylene]-, 1,3-diethyl ester
1-[(TERT-BUTOXY)CARBONYL]-2,3-DIHYDRO-1H-INDOLE-5-CARBOXYLIC ACID
1-O-benzyl 3-O-methyl 3-methylazetidine-1,3-dicarboxylate
ETHYL 8-METHOXY-2-OXO-2,3,4,5-TETRAHYDRO-1H-BENZO[B]AZEPINE-4-CARBOXYLATE
1-Piperidinecarboxylic acid, 4-(Methylsulfonyl)-, 1,1-dimethylethyl ester
METHYL 6-HYDROXY-7-(2-METHYLALLYL)-5-OXO-1,2,3,5-TETRAHYDROINDOLIZINE-8-CARBOXYLATE
4-(diethylamino)benzenediazonium tetrafluoroborate
(R)-1-((Benzyloxy)carbonyl)piperidine-3-carboxylic acid
(2S)-2-cyclohexyl-2-(pyrazine-2-carbonylamino)acetic acid
4-phenyl-4,10-dihydro-[1,3,5]triazino[1,2-a]benzimidazol-2-amine
N-methyl-6-phenyl-3-(2-pyridinyl)-1,2,4-triazin-5-amine
2-[3-(4-Cyanoanilino)-1-(dimethylamino)-2-propenylidene]malononitrile
8-(Pyrimidin-2-ylamino)naphthalene-2-carboximidamide
pentalenolactone D(1-)
A monocarboxylic acid anion that is the conjugate base of pentalenolactone D, obtained by deprotonation of the carboxy group; major species at pH 7.3.
(1S,4aR,9aR)-1,8,8-trimethyl-3-oxo-1,4,4a,6a,7,9-hexahydropentaleno[6a,1-c]pyran-5-carboxylate
N-[2-(4-methoxyphenyl)ethyl]-2,3-dihydro-1,4-dioxin-5-carboxamide
neopentalenolactone D(1-)
A monocarboxylic acid anion that is the conjugate base of neopentalenolactone D, obtained by deprotonation of the carboxy group; major species at pH 7.3.
4-tert-butyl-2-{(2E)-2-[(5-methylfuran-2-yl)methylidene]hydrazinyl}-1,3-thiazole
(3R)-5-[(2R,3R,5R,6S)-3,5-dihydroxy-6-methyloxan-2-yl]oxy-3-hydroxypentanoate
(3S,4R)-4-[(2S,3R,5R,6S)-3,5-dihydroxy-6-methyloxan-2-yl]oxy-3-hydroxypentanoate
Benzylmethylamino-1,2-bis(methoxycarbonyl)ethylene
7-[3-(ethylamino)phenyl]pyrazolo[1,5-a]pyrimidine-3-carbonitrile
N-(N-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)carbamimidoyl)-N-methylglycine
Dioxoaminopyrine
A monocarboxylic acid amide that is N,N-dimethyl-2-oxoacetamide substituted by a 2-acetyl-2-methyl-1-phenylhydrazinyl group at position 2. It is a metabolite of the drug aminopyrine.
