neurine
{{chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 427065934
| ImageFile = Neurine Structural Formula V1.svg
| ImageSize = 150px
| IUPACName = Trimethylvinylammonium hydroxide
| OtherNames = Vitaloid; N,N,N-Trimethylethenaminium hydroxide
|Section1={{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|??}}
| CASNo = 463-88-7
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = G6RL36OO0J
| PubChem = 10042
| SMILES = C=C[N+](C)(C)C.[OH-]
| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}
| ChemSpiderID = 9647
| InChI = 1/C5H12N.H2O/c1-5-6(2,3)4;/h5H,1H2,2-4H3;1H2/q+1;/p-1
| InChIKey = NIPLIJLVGZCKMP-REWHXWOFAL
| StdInChI_Ref = {{stdinchicite|changed|chemspider}}
| StdInChI = 1S/C5H12N.H2O/c1-5-6(2,3)4;/h5H,1H2,2-4H3;1H2/q+1;/p-1
| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}
| StdInChIKey = NIPLIJLVGZCKMP-UHFFFAOYSA-M
}}
|Section2={{Chembox Properties
| Formula = C5H13NO
| MolarMass = 103.16
| Appearance = Syrupy liquid
| Density =
| MeltingPt =
| BoilingPt =
| Solubility = Soluble
}}
|Section3={{Chembox Hazards
| MainHazards =
| FlashPt =
| AutoignitionPt =
}}
}}
Neurine is an alkaloid found in egg yolk, brain, bile and in cadavers. It is formed during putrefaction of biological tissues by the dehydration of choline. It is a poisonous, syrupy liquid with a fishy odor.
Neurine is a quaternary ammonium salt with three methyl groups and one vinyl group attached to the nitrogen atom. Synthetically, neurine can be prepared by the reaction of acetylene with trimethylamine.{{Cite journal|last1=Gardner|first1=C.|last2=Kerrigan|first2=V.|last3=Rose|first3=J. D.|last4=Weedon|first4=B. C. L.|date=1949-01-01|title=169. Acetylene reactions. Part IV. Formation of trimethylvinyl- and tetramethyl-ammonium hydroxide from acetylene and aqueous trimethylamine|url=https://pubs.rsc.org/en/content/articlelanding/1949/jr/jr9490000789|journal=Journal of the Chemical Society (Resumed)|language=en|pages=789–792|doi=10.1039/JR9490000789|issn=0368-1769}} Neurine is unstable and decomposes readily to form trimethylamine.