Exact Mass: 686.5597434

Exact Mass Matches: 686.5597434

Found 500 metabolites which its exact mass value is equals to given mass value 686.5597434, within given mass tolerance error 0.05 dalton. Try search metabolite list with more accurate mass tolerance error 0.01 dalton.

DG(18:2n6/0:0/22:2n6)

(2S)-2-Hydroxy-3-[(9Z,12Z)-nonadeca-9,12-dienoyloxy]propyl (13Z,16Z)-docosa-13,16-dienoic acid

C44H78O5 (686.5848937999999)

DG(18:2n6/0:0/22:2n6) is a diglyceride, or a diacylglycerol (DAG). It is a glyceride consisting of two fatty acid chains covalently bonded to a glycerol molecule through ester linkages. Diacylglycerols can have many different combinations of fatty acids attached at the C-1, C-2, or C-3 positions. DG(18:2n6/0:0/22:2n6), in particular, consists of one chain of linoleic acid at the C-1 position and one chain of docosadienoic acid at the C-3 position. The linoleic acid moiety is derived from seed oils, while the docosadienoic acid moiety is derived from animal fats. Mono- and diacylglycerols are common food additives used to blend together certain ingredients, such as oil and water, which would not otherwise blend well. Dacylglycerols are often found in bakery products, beverages, ice cream, chewing gum, shortening, whipped toppings, margarine, and confections.
Synthesis of diacylglycerol begins with glycerol-3-phosphate, which is derived primarily from dihydroxyacetone phosphate, a product of glycolysis (usually in the cytoplasm of liver or adipose tissue cells). Glycerol-3-phosphate is first acylated with acyl-coenzyme A (acyl-CoA) to form lysophosphatidic acid, which is then acylated with another molecule of acyl-CoA to yield phosphatidic acid. Phosphatidic acid is then de-phosphorylated to form diacylglycerol.
Diacylglycerols are precursors to triacylglycerols (triglyceride), which are formed by the addition of a third fatty acid to the diacylglycerol under the catalysis of diglyceride acyltransferase. Since diacylglycerols are synthesized via phosphatidic acid, they will usually contain a saturated fatty acid at the C-1 position on the glycerol moiety and an unsaturated fatty acid at the C-3 position.

SM(d17:2(4E,8Z)/16:0)

(2-{[(2S,3R,4E,8Z)-2-hexadecanamido-3-hydroxyheptadeca-4,8-dien-1-yl phosphono]oxy}ethyl)trimethylazanium

C38H75N2O6P (686.5362460000001)

Sphingomyelin (d17:2(4E,8Z)/16:0) or SM(d17:2(4E,8Z)/16:0) is a type of sphingolipid found in animal cell membranes, especially in the membranous myelin sheath which surrounds some nerve cell axons. It usually consists of phosphorylcholine and ceramide. SM(d17:2(4E,8Z)/16:0) consists of a 4E,8Z-heptadecasphingdienine backbone and a palmitic acid chain. In humans, sphingomyelin is the only membrane phospholipid not derived from glycerol. Like all sphingolipids, SM has a ceramide core (sphingosine bonded to a fatty acid via an amide linkage). In addition, it contains one polar head group, which is either phosphocholine or phosphoethanolamine. The plasma membrane of cells is highly enriched in sphingomyelin and is considered largely to be found in the exoplasmic leaflet of the cell membrane. However, there is some evidence that there may also be a sphingomyelin pool in the inner leaflet of the membrane. Moreover, neutral sphingomyelinase-2, an enzyme that breaks down sphingomyelin into ceramide, has been found to localize exclusively to the inner leaflet further suggesting that there may be sphingomyelin present there. Sphingomyelin can accumulate in a rare hereditary disease called Niemann-Pick Disease, types A and B. Niemann-Pick disease is a genetically-inherited disease caused by a deficiency in the enzyme sphingomyelinase, which causes the accumulation of sphingomyelin in spleen, liver, lungs, bone marrow, and the brain, causing irreversible neurological damage. SMs play a role in signal transduction. Sphingomyelins are synthesized by the transfer of phosphorylcholine from phosphatidylcholine to a ceramide in a reaction catalyzed by sphingomyelin synthase.

CE(20:4(6E,8Z,11Z,14Z)+=O(5))

(1S,2R,5S,10S,11S,14R,15R)-2,15-dimethyl-14-[(2R)-6-methylheptan-2-yl]tetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-7-en-5-yl (6E,8Z,11Z,14Z)-5-oxoicosa-6,8,11,14-tetraenoate

C47H74O3 (686.5637654)

CE(20:4(6E,8Z,11Z,14Z)+=O(5)) belongs to the family of cholesteryl esters, whose structure is characetized by a cholesterol esterified at the 3-position with a fatty acid. A cholesteryl ester is an ester of cholesterol. Fatty acid esters of cholesterol constitute about two-thirds of the cholesterol in the plasma. Cholesterol is a sterol (a combination steroid and alcohol) and a lipid found in the cell membranes of all body tissues, and transported in the blood plasma of all animals. The accumulation of cholesterol esters in the arterial intima (the innermost layer of an artery, in direct contact with the flowing blood) is a characteristic feature of atherosclerosis. Atherosclerosis is a disease affecting arterial blood vessels. It is a chronic inflammatory response in the walls of arteries, in large part to the deposition of lipoproteins (plasma proteins that carry cholesterol and triglycerides). CE(20:4(6E,8Z,11Z,14Z)+=O(5)) may also accumulate in hereditary hypercholesterolemia, an inborn error of metabolism.

CE(20:4(5Z,8Z,11Z,13E)+=O(15))

(1S,2R,5S,10S,11S,14R,15R)-2,15-dimethyl-14-[(2R)-6-methylheptan-2-yl]tetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-7-en-5-yl (5Z,8Z,11Z,13E)-15-oxoicosa-5,8,11,13-tetraenoate

C47H74O3 (686.5637654)

CE(20:4(5Z,8Z,11Z,13E)+=O(15)) belongs to the family of cholesteryl esters, whose structure is characetized by a cholesterol esterified at the 3-position with a fatty acid. A cholesteryl ester is an ester of cholesterol. Fatty acid esters of cholesterol constitute about two-thirds of the cholesterol in the plasma. Cholesterol is a sterol (a combination steroid and alcohol) and a lipid found in the cell membranes of all body tissues, and transported in the blood plasma of all animals. The accumulation of cholesterol esters in the arterial intima (the innermost layer of an artery, in direct contact with the flowing blood) is a characteristic feature of atherosclerosis. Atherosclerosis is a disease affecting arterial blood vessels. It is a chronic inflammatory response in the walls of arteries, in large part to the deposition of lipoproteins (plasma proteins that carry cholesterol and triglycerides). CE(20:4(5Z,8Z,11Z,13E)+=O(15)) may also accumulate in hereditary hypercholesterolemia, an inborn error of metabolism.

CE(20:5(5Z,8Z,11Z,14Z,16E)-OH(18R))

(1S,2R,5S,10S,11S,14R,15R)-2,15-dimethyl-14-[(2R)-6-methylheptan-2-yl]tetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-7-en-5-yl (5Z,8Z,11Z,14Z,16E,18S)-18-hydroxyicosa-5,8,11,14,16-pentaenoate

C47H74O3 (686.5637654)

CE(20:5(5Z,8Z,11Z,14Z,16E)-OH(18R)) belongs to the family of cholesteryl esters, whose structure is characetized by a cholesterol esterified at the 3-position with a fatty acid. A cholesteryl ester is an ester of cholesterol. Fatty acid esters of cholesterol constitute about two-thirds of the cholesterol in the plasma. Cholesterol is a sterol (a combination steroid and alcohol) and a lipid found in the cell membranes of all body tissues, and transported in the blood plasma of all animals. The accumulation of cholesterol esters in the arterial intima (the innermost layer of an artery, in direct contact with the flowing blood) is a characteristic feature of atherosclerosis. Atherosclerosis is a disease affecting arterial blood vessels. It is a chronic inflammatory response in the walls of arteries, in large part to the deposition of lipoproteins (plasma proteins that carry cholesterol and triglycerides). CE(20:5(5Z,8Z,11Z,14Z,16E)-OH(18R)) may also accumulate in hereditary hypercholesterolemia, an inborn error of metabolism.

CE(20:5(5Z,8Z,11Z,14Z,16E)-OH(18))

(1S,2R,5S,10S,11S,14R,15R)-2,15-dimethyl-14-[(2R)-6-methylheptan-2-yl]tetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-7-en-5-yl (5Z,8Z,11Z,13E,17Z)-16-hydroxyicosa-5,8,11,13,17-pentaenoate

C47H74O3 (686.5637654)

CE(20:5(5Z,8Z,11Z,14Z,16E)-OH(18)) belongs to the family of cholesteryl esters, whose structure is characetized by a cholesterol esterified at the 3-position with a fatty acid. A cholesteryl ester is an ester of cholesterol. Fatty acid esters of cholesterol constitute about two-thirds of the cholesterol in the plasma. Cholesterol is a sterol (a combination steroid and alcohol) and a lipid found in the cell membranes of all body tissues, and transported in the blood plasma of all animals. The accumulation of cholesterol esters in the arterial intima (the innermost layer of an artery, in direct contact with the flowing blood) is a characteristic feature of atherosclerosis. Atherosclerosis is a disease affecting arterial blood vessels. It is a chronic inflammatory response in the walls of arteries, in large part to the deposition of lipoproteins (plasma proteins that carry cholesterol and triglycerides). CE(20:5(5Z,8Z,11Z,14Z,16E)-OH(18)) may also accumulate in hereditary hypercholesterolemia, an inborn error of metabolism.

CE(20:5(5Z,8Z,10E,14Z,17Z)-OH(12))

(1S,2R,5S,10S,11S,14R,15R)-2,15-dimethyl-14-[(2R)-6-methylheptan-2-yl]tetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-7-en-5-yl (5Z,8Z,10E,14Z,17Z)-12-hydroxyicosa-5,8,10,14,17-pentaenoate

C47H74O3 (686.5637654)

CE(20:5(5Z,8Z,10E,14Z,17Z)-OH(12)) belongs to the family of cholesteryl esters, whose structure is characetized by a cholesterol esterified at the 3-position with a fatty acid. A cholesteryl ester is an ester of cholesterol. Fatty acid esters of cholesterol constitute about two-thirds of the cholesterol in the plasma. Cholesterol is a sterol (a combination steroid and alcohol) and a lipid found in the cell membranes of all body tissues, and transported in the blood plasma of all animals. The accumulation of cholesterol esters in the arterial intima (the innermost layer of an artery, in direct contact with the flowing blood) is a characteristic feature of atherosclerosis. Atherosclerosis is a disease affecting arterial blood vessels. It is a chronic inflammatory response in the walls of arteries, in large part to the deposition of lipoproteins (plasma proteins that carry cholesterol and triglycerides). CE(20:5(5Z,8Z,10E,14Z,17Z)-OH(12)) may also accumulate in hereditary hypercholesterolemia, an inborn error of metabolism.

CE(20:5(6E,8Z,11Z,14Z,17Z)-OH(5))

(1S,2R,5S,10S,11S,14R,15R)-2,15-dimethyl-14-[(2R)-6-methylheptan-2-yl]tetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-7-en-5-yl (6E,8Z,11Z,14Z,17Z)-5-hydroxyicosa-6,8,11,14,17-pentaenoate

C47H74O3 (686.5637654)

CE(20:5(6E,8Z,11Z,14Z,17Z)-OH(5)) belongs to the family of cholesteryl esters, whose structure is characetized by a cholesterol esterified at the 3-position with a fatty acid. A cholesteryl ester is an ester of cholesterol. Fatty acid esters of cholesterol constitute about two-thirds of the cholesterol in the plasma. Cholesterol is a sterol (a combination steroid and alcohol) and a lipid found in the cell membranes of all body tissues, and transported in the blood plasma of all animals. The accumulation of cholesterol esters in the arterial intima (the innermost layer of an artery, in direct contact with the flowing blood) is a characteristic feature of atherosclerosis. Atherosclerosis is a disease affecting arterial blood vessels. It is a chronic inflammatory response in the walls of arteries, in large part to the deposition of lipoproteins (plasma proteins that carry cholesterol and triglycerides). CE(20:5(6E,8Z,11Z,14Z,17Z)-OH(5)) may also accumulate in hereditary hypercholesterolemia, an inborn error of metabolism.

DG(20:0/20:4(6E,8Z,11Z,14Z)+=O(5)/0:0)

(2S)-1-Hydroxy-3-(icosanoyloxy)propan-2-yl (8Z,11Z,14Z)-5-oxoicosa-6,8,11,14-tetraenoic acid