In chemistry, an enantiomer (/ɪˈnænti.əmər, ɛ-, -oʊ-/ ih-NAN-tee-ə-mər; from Ancient Greek ἐναντίος (enantíos) 'opposite', and μέρος (méros) 'part') –...
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Enantiomeric excess (redirect from Enantiomer excess)
contains one enantiomer in greater amounts than the other. A racemic mixture has an ee of 0%, while a single completely pure enantiomer has an ee of 100%...
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ˈræsɪmeɪt/) is one that has equal amounts of left- and right-handed enantiomers of a chiral molecule or salt. Racemic mixtures are rare in nature, but...
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Chirality (chemistry) (redirect from Enantiomerism)
mixture of the two enantiomers in equal parts is said to be racemic, and it usually differs chemically and physically from the pure enantiomers. Chiral molecules...
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Enantiopure drug (redirect from Single-enantiomer drugs)
The desired enantiomer is known as an eutomer while the undesired enantiomer is known as the distomer. When equal amounts of both enantiomers are found...
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Chiral analysis (redirect from Enantiomer analysis)
quantification of component enantiomers of racemic drug substances or pharmaceutical compounds. Other synonyms commonly used include enantiomer analysis, enantiomeric...
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Optical rotation (redirect from Levorotatory enantiomer)
some molecules the (R)-enantiomer is the dextrorotary (+) enantiomer, and in other cases it is the laevorotary (−) enantiomer. The relationship must be...
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sources produce one enantiomer: the principal industrial source, citrus fruit, contains (+)-limonene (d-limonene), which is the (R)-enantiomer. (+)-Limonene...
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implies the enantiomer, L-theanine, which is the form found in tea leaves from which it is extracted as a powder. The right-handed enantiomer, D-theanine...
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Chemically, levocetirizine is the active levorotary enantiomer of cetirizine, also called the l-enantiomer of cetirizine. It is a member of the diphenylmethylpiperazine...
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as a racemic mixture. The R-enantiomer undergoes extensive interconversion to the S-enantiomer in vivo. The S-enantiomer is believed to be the more pharmacologically...
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D-norpseudoephedrine), the (+)-enantiomer and most widely known form of the compound L-Norpseudoephedrine, the (-)-enantiomer of the compound...
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compound by a method that favors the formation of a specific enantiomer or diastereomer. Enantiomers are stereoisomers that have opposite configurations at...
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racemic (optically inactive) form. This creates a 1:1 molar ratio of enantiomers and is referred to as a racemic mixture (i.e. contain equal amount of...
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Molecular configuration (section Enantiomers)
molecular configurations as the spatial connectivity of bonds is identical. Enantiomers are molecules having one or more chiral centres that are mirror images...
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S–(+)–ondansetron, and the two enantiomers have significantly different kinetics. In rats given 2 mg/kg intravenous doses of each enantiomer separately, R–(–)–ondansetron...
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Enantiomer self-disproportionation is a process in stereochemistry describing the separation of a non-racemic mixture of enantiomers in an enantioenriched...
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is, excluding the opposing enantiomer). Diastereomers have different physical properties (unlike most aspects of enantiomers) and often different chemical...
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amino acid with the formula CH3CH2CH(CH3)CH(NH2)CO2H. It exists as two enantiomers, of which the L derivative occurs naturally. L-Alloisoleucine occurs...
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variety of notable derivatives of 1- and 2-aminoindane are known. The (R)-enantiomer of 1-aminoindan, (R)-1-aminoindan, is pharmacologically active and is...
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called an enantiomer. Drugs that exhibit handedness are referred to as chiral drugs. Chiral drugs that are equimolar (1:1) mixture of enantiomers are called...
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two enantiomers, L-α-aminoadipate and D-α-aminoadipate. The L-enantiomer appears during lysine biosynthesis and degradation, whereas the D-enantiomer is...
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(R)-(−)-enantiomer (CIP nomenclature) is shown in the image at right (top), and is responsible for the pharmacologic activity; the (S)-(+)-enantiomer (bottom)...
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Isomer (section Enantiomers)
The two enantiomers can be distinguished, for example, by the right-hand rule. This type of isomerism is called axial isomerism. Enantiomers behave identically...
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to the GABAB receptor, but this is selective for the (S)-enantiomer, while the (R)-enantiomer does not bind to the GABAB protein. 2-Hydroxysaclofen has...
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chirality and the two enantiomers can be readily separated and are stable toward racemisation. The specific rotation of the two enantiomers is 35.5° (c = 1...
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Stereoisomerism (section Enantiomers)
light and how they interact with different enantiomers of other compounds. As a result, different enantiomers of a compound may have substantially different...
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nonsteroidal anti-inflammatory drug (NSAID). It is the active dextrorotatory enantiomer of ibuprofen. Most ibuprofen formulations contain a racemic mixture of...
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different substituents. This type of construction creates two possible enantiomers. Absolute configuration uses a set of rules to describe the relative...
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(R)-enantiomers. Omeprazole is a racemate, an equal mixture of the two. In the acidic conditions of the canaliculi of parietal cells, both enantiomers are...
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