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Record Information
StatusDetected and Quantified
Creation Date2008-09-12 01:33:06 UTC
Update Date2022-03-07 02:50:04 UTC
Secondary Accession Numbers
  • HMDB08204
Metabolite Identification
Common NamePC(18:3(9Z,12Z,15Z)/18:2(9Z,12Z))
DescriptionPC(18:3(9Z,12Z,15Z)/18:2(9Z,12Z)) is a phosphatidylcholine (PC or GPCho). It is a glycerophospholipid in which a phosphorylcholine moiety occupies a glycerol substitution site. As is the case with diacylglycerols, glycerophosphocholines can have many different combinations of fatty acids of varying lengths and saturation attached at the C-1 and C-2 positions. Fatty acids containing 16, 18 and 20 carbons are the most common. PC(18:3(9Z,12Z,15Z)/18:2(9Z,12Z)), in particular, consists of one chain of a-linolenic acid at the C-1 position and one chain of linoleic acid at the C-2 position. The a-linolenic acid moiety is derived from seed oils, especially canola and soybean oil, while the linoleic acid moiety is derived from seed oils. Phospholipids, are ubiquitous in nature and are key components of the lipid bilayer of cells, as well as being involved in metabolism and signaling.While most phospholipids have a saturated fatty acid on C-1 and an unsaturated fatty acid on C-2 of the glycerol backbone, the fatty acid distribution at the C-1 and C-2 positions of glycerol within phospholipids is continually in flux, owing to phospholipid degradation and the continuous phospholipid remodeling that occurs while these molecules are in membranes. PCs can be synthesized via three different routes. In one route, choline is activated first by phosphorylation and then by coupling to CDP prior to attachment to phosphatidic acid. PCs can also synthesized by the addition of choline to CDP-activated 1,2-diacylglycerol. A third route to PC synthesis involves the conversion of either PS or PE to PC.
1-a-linolenoyl-2-linoleoyl-sn-glycero-3-phosphocholineLipid Annotator, HMDB
GPCho(18:3/18:2)Lipid Annotator, HMDB
GPCho(36:5)Lipid Annotator, HMDB
PC(18:3/18:2)Lipid Annotator, HMDB
Phosphatidylcholine(36:5)Lipid Annotator, HMDB
LecithinLipid Annotator, HMDB
PC(36:5)Lipid Annotator, HMDB
Phosphatidylcholine(18:3/18:2)Lipid Annotator, HMDB
1-(9Z,12Z,15Z-octadeatrienoyl)-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholineLipid Annotator, HMDB
PC(18:3(9Z,12Z,15Z)/18:2(9Z,12Z))Lipid Annotator
Chemical FormulaC44H78NO8P
Average Molecular Weight780.0658
Monoisotopic Molecular Weight779.546504989
IUPAC Nametrimethyl(2-{[(2R)-3-[(9Z,12Z,15Z)-octadeca-9,12,15-trienoyloxy]-2-[(9Z,12Z)-octadeca-9,12-dienoyloxy]propyl phosphonato]oxy}ethyl)azanium
Traditional Namelecithin
CAS Registry NumberNot Available
InChI Identifier
Chemical Taxonomy
Description Belongs to the class of organic compounds known as phosphatidylcholines. These are glycerophosphocholines in which the two free -OH are attached to one fatty acid each through an ester linkage.
KingdomOrganic compounds
Super ClassLipids and lipid-like molecules
Sub ClassGlycerophosphocholines
Direct ParentPhosphatidylcholines
Alternative Parents
  • Diacylglycero-3-phosphocholine
  • Phosphocholine
  • Fatty acid ester
  • Dialkyl phosphate
  • Dicarboxylic acid or derivatives
  • Organic phosphoric acid derivative
  • Phosphoric acid ester
  • Alkyl phosphate
  • Fatty acyl
  • Quaternary ammonium salt
  • Tetraalkylammonium salt
  • Carboxylic acid ester
  • Carboxylic acid derivative
  • Organic oxygen compound
  • Organic nitrogen compound
  • Carbonyl group
  • Organooxygen compound
  • Organonitrogen compound
  • Organic oxide
  • Organopnictogen compound
  • Amine
  • Organic salt
  • Hydrocarbon derivative
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors
Physiological effect
Naturally occurring process