U.S. Department of Health & Human Services Divider Arrow National Institutes of Health Divider Arrow NCATS
This repository is under review for potential modification in compliance with Administration directives.

Details

Stereochemistry RACEMIC
Molecular Formula C7H15NO3
Molecular Weight 161.1989
Optical Activity ( + / - )
Defined Stereocenters 0 / 2
E/Z Centers 0
Charge 0

SHOW SMILES / InChI
Structure of DL-CARNITINE

SMILES

C[N+](C)(C)CC(O)CC([O-])=O

InChI

InChIKey=PHIQHXFUZVPYII-UHFFFAOYSA-N
InChI=1S/C7H15NO3/c1-8(2,3)5-6(9)4-7(10)11/h6,9H,4-5H2,1-3H3

HIDE SMILES / InChI

Description

L-carnitine (L-beta-hydroxy-gamma-N,N,N-trimethylaminobutyric acid) is conditionally necessary for mitochondrial transport and metabolism of long-chain fatty acids, and thus for myocardial energetic metabolism. D-carnitine is not biologically active and might interfere with proper utilization of the L isomer, and so there are claims that the racemic mixture (DL-carnitine) should be avoided. The pharmacological effects of carnitine are stereospecific: L-carnitine was effective in various animal and clinical studies, while D- and DL-carnitine was found to be ineffective or even toxic to some cells and tissues, such as muscle cells and the myocardium. DL-carnitine caused symptoms of myasthenia and cardiac arrhythmias, which disappeared after L-carnitine administration.

CNS Activity

Approval Year

Conditions

ConditionModalityTargetsHighest PhaseProduct

PubMed

Sample Use Guides

In Vivo Use Guide
in rat: supplemented with dl-carnitine (DLC) (1.2 mmol . kg-1. d-1)
Route of Administration: Oral
In Vitro Use Guide
Using rat phrenic nerve diaphragm preparations indirectly and directly stimulated with high rate pulses, D-carnitine (30 and 60 micro M), L-carnitine (60 micro M) and DL-carnitine (60 micro M) were shown to induce tetanic fade (D-carnitine = 19.7 +/- 3.1%, N = 6; L-carnitine = 16.6 +/- 2.4%, N = 6; DL-carnitine = 14.9 +/- 2.1%, N = 6) without any reduction of maximal tetanic tension. It was shown, that tetanic fade induced by L- and DL-carnitine was antagonized by choline (60 micro M).