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Either of a pair of molecules that are mirror images but cannot be superimposed on each other, and that rotate the plane of polarized light by an equal amount in opposite directions. Also called enantiomorph, optical isomer.

[Greek enantios, opposite; see ant- in Indo-European roots + -mer, isomer.]

en·an′ti·o·mer′ic (-mĕr′ĭk) adj.


(Chemistry) chem a molecule that exhibits stereoisomerism because of the presence of one or more chiral centres


(ɪˈnæn ti ə mər)

either of a pair of optical isomers that are mirror images of each other.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.enantiomer - either one of a pair of compounds (crystals or molecules) that are mirror images on each other but are not identical
chemical compound, compound - (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
References in periodicals archive ?
The title will cover new material including the use of enzymes for the synthesis and resolution of enantiomeric compounds as well, as their use in drug discovery; how stereochemistry impacts on decisions taken during the ADMET (absorption, distribution, metabolism, excretion, toxicity) stage of drug discovery; issues faced during the final stages of the drug development process; the impact of ICH (International Conference on Harmonisation) on the use of single isomer drugs; racemic switches; and legal perspectives looking at IP and patent issues surrounding chiral switches and marketing single enantiomer switches.
Both enantiomers can be synthesized by choosing the appropriate enantiomer of the catalyst and the reaction is clean, simple and economical to operate.
Pfizer said today that an Austrian appeals court ruling on the enantiomer patent for Lipitor applies only to Austria and is not relevant to patent litigation between Ranbaxy and Pfizer in any other jurisdiction.
The method of Zhou and Krull (22) lacks sensitivity, with the lowest point of the calibration curve corresponding to 150 [micro]L for each AM enantiomer.
Esciralopram (Lexapro) is the enantiomer of ciralopram (Celexa) and is likely responsible for the potent and selective seroronin reuptake inhibitory activity of the established drug.
The enantiomer patent will remain in force during the appeals process,
This ensures cost efficient separations of kilograms to tens of kilograms of pure enantiomer for clinical supplies.
Ten chapters discuss stereochemistry of molecules in inclusion crystals, torsional motion of Stilbene-type molecules in crystals, supramolecular networks of porphyrins, homo- and heterochirality in crystals, supramolecular synthesis of one-dimensional chains and two-dimensional layer in hydrogen bond networks of ureas and two-pyrimidinones, chiral auxiliaries powerful for both enantiomer resolution and determination of absolute configuration by x-ray crystallography, stereoselective thermal solid-state reactions, and other topics.
Introducing deuterium enables dosing of a single, deuterated enantiomer to create an improved NCE with new composition of matter patent protection.
When the researchers placed the membrane between one solution containing both enantiomers and another solution with neither, they found that twice as much of the antibody-binding enantiomer passed through the membrane.
The enzymatically produced L-theanine ingredient offered by Taiyo indeed proved to be comprised solely of the L- enantiomer.
While one enantiomer may be a potent attractant, the opposite enantiomer may have no activity or may even be a repellent.