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Both of them have three isomers containing two enantiomers (P6), (M6), and a diastereoisomer in a meso form (P,M).
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The addition of traces of cadmium nitrate in the samples solubilized in acetone-d6 led to fully resolved NMR signals of phenolic protons, allowing the unambiguous structural determination of six reaction products, one of the fractions containing two enantiomers.
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The readily available racemic tetrafluoro-benzobarrelene complexes [(R 2 -TFB)RhCl] 2 were separated into two enantiomers via selective coordination of one of them with the auxiliary S -salicyl-oxazoline ligand.
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In the absence of Cu, Br-TPyP formed chiral SPs as two enantiomers via self-assembly, which were functionalized via divergent cross-coupling reaction with 4-isocyano-1,1'-biphenyl (ICBP).
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For chiral molecules, we show that the orientation induced by a cross-polarized two-color pulse is enantioselective along the laser propagation direction, namely, the two enantiomers are oriented in opposite directions.
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So, there are two enantiomers (R and S), whose chemical properties are similar, but which have optical rotations of opposite sign.
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Limonene is a monoterpene available in two enantiomers: R-(+)-limonene and S-(-)-limonene.
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Equol exists in two enantiomers of R-equol and S-equol.
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Consequently, oxidation of the secondary alcohols is restricted to one of the two enantiomers.
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CFs are produced and field-applied as racemic (1:1) mixtures of two enantiomers (one chiral center in the molecule) or four diastereoisomers, i.
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One of the high-yielding regioisomers exhibits optical activity as a result of the presence of an 8:1 ratio of the two enantiomers following separation by high-performance liquid chromatography.
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The differences in the biological activity identified between the two enantiomers in this study enhance our understanding of the toxicity mechanism of exogenous auxin via their effects on phytohormones.
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Similar behavior has been studied in chiral HPLC, where minor modifications to the mobile phase can induce elution order reversal of two enantiomers on a chiral stationary phase column.
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The readily available racemic tetrafluoro-benzobarrelene complexes [(R 2 -TFB)RhCl] 2 were separated into two enantiomers via selective coordination of one of them with the auxiliary S -salicyl-oxazoline ligand.
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CCA showed that g-Massilia and
g-Arthrobacter are closely related to nitrogen fixation genes and
nitrification genes and degradation of the two enantiomers of CYF by
g-Arthrobacter is closely related.
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its two enantiomers is also presented.
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The study compared the in vitro antitrypanosomal activity of the two enantiomers with the racemic mixture against three Trypanosoma brucei gambiense strains.
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Amphetamines present a chiral centre and thus two enantiomers, which is important from a toxicological point of view because they may have different pharmacokinetic and pharmacological properties.
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The absolute configurations of the two enantiomers eluted on the Superchiral IG-3 column were confirmed as R-(-)-mefentrifluconazole and S-(+)-mefentrifluconazole.
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After 14 days of culture, the degradation kinetics results demonstrated the degradation process of the two enantiomers conforms to first-order degradation kinetics equation, and the degradation rates were significantly different (paired t-test, P < 0.
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Both of them have three isomers containing two enantiomers (P6), (M6), and a diastereoisomer in a meso form (P,M).
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The toxicity of Rac was higher than that of the two enantiomers, mainly derived from S configuration.
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Chiral resolution were further carried out on a cellulose column by HPLC, and compounds 2-5 were successfully separated into two enantiomers, respectively.
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Discrimination is conveniently and reproducibly achieved in terms of significant potential differences for the two enantiomers, specularly inverting either probe or selector configuration.
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Background Linalool, an acyclic monoterpene alcohol, is extensively used in the flavor and fragrance industries and exists as two enantiomers, ( S )- and ( R )-linalool, which have different odors and biological properties.
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DFT calculations, however, revealed a significant difference in the binding properties of the two enantiomers.
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In the absence of Cu, Br-TPyP formed chiral SPs as two enantiomers via self-assembly, which were functionalized via divergent cross-coupling reaction with 4-isocyano-1,1'-biphenyl (ICBP).
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A new approach for the asymmetric synthesis of the two enantiomers of β-phosphorus-containing α-amino acids was developed via Michael addition of secondary phosphine oxides and dialkyl phosphites to chiral Ni(II)-complexes of a dehydroalanine-Schiff base.
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Here, we show how chiral molecules can be prepared in a quantum superposition of two enantiomers by far-field matter-wave diffraction and how the resulting tunnelling dynamics can be observed.
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Herein, we report the stereoselective synthesis of two enantiomers of chiral conjugated nanohoops by incorporating dibenzo[a,e]pentalenes (DBPs), which are generated in the last synthetic step from enantiomerically pure diketone precursors.
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To investigate the possible teratological effects of the two enantiomers of a racemic KCP-10043F, therefore chiral resolution of (±)-KCP-10043F was performed and subsequently followed by a series of chemical processes to afford the corresponding chiral diastereomers.
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Herein, two enantiomers of isocarbophos (ICP) were separated and the enantioselectivity in insecticidal activity against the pest Locusta migratoria manilensis (L.
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Due to their anisotropic geometry, the two enantiomers are packed in a frustrated fashion within this crystalline phase, in which single-handed double helices are observed, i.
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We developed a multi-scale in silico pipeline focusing on hERG channel - drug interactions and used it to probe and predict the mechanisms of pro-arrhythmia risks of the two enantiomers of sotalol.
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Under the optimal conditions selected, the separation of the two enantiomers was obtained.
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CCA showed that g-Massilia and g-Arthrobacter are closely related to nitrogen fixation genes and nitrification genes and degradation of the two enantiomers of CYF by g-Arthrobacter is closely related.
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The two enantiomers differ from each other in their association rates.
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As MDMA is a chiral substance with one chiral center, it may occur as two enantiomers.
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Compound III constitutes an example of the rarest case of racemic solid solution (pseudoracemate), where a lack of chiral discrimination with respect to the two enantiomers leads to an enantiomeric disorder of a racemic mixture with different occupancies at the reference site.
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Methodologic validation was confirmed using two enantiomers of ibuprofen, and all parameters meet the testing requirements.
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The results showed that the two enantiomers of myclobutanil were well separated by this method.
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Rimantadine has two enantiomers, though most investigations into drug binding and inhibition have used a racemic mixture.
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As an example, one of the two enantiomers was used as a starting material to prepare (+)-halofuginone in a three-step procedure.
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Here, we first conducted Eyring analysis to confirm the entropy-driven character of our previously reported 1,2-type Friedel-Crafts (FC) reaction of sesamol with imine, catalyzed by conformationally flexible guanidine-bisthiourea bifunctional organocatalyst, and then we carried out computational studies to compare the transition states leading to the two enantiomers.
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Between the two enantiomers of Pen, only D-Pen can be used to treat cystinuria and rheumatoid arthritis while L-Pen is toxic.
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Synergistic elimination may occur when two enantiomers coexisted in lizard liver and stomach, while the racemate produced antagonistic elimination in lizard fat.
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CONCLUSIONS
These findings further highlight differences between two enantiomers of d,l-govadine that may reflect differential modulation of D1 and D2 receptors.
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NEB is composed of a racemic mixture of two enantiomers: d-nebivolol, which exerts antagonist effects on β1-adrenoceptors, and l-nebivolol, a vascular β3 receptor agonist.
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The two enantiomers of the Au13 clusters can be separated by chiral HPLC, and the isolated enantiomers were characterized by circular dichroism spectroscopy.
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The interactions of the two enantiomers in the cocrystal were further analyzed (mapping Hirshfeld surfaces and 2D fingerprint) and compared to those of 4.
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Thalidomide is a drug that presents two enantiomers with markedly different pharmacological and toxicological activities.
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The optimized mobile phase composition allowed to perfectly separate the two enantiomers of medetomidine in a short chromatographic run time, using a cellulose tris(4-methylbenzoate) based chiral column.
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The addition of traces of cadmium nitrate in the samples solubilized in acetone-d6 led to fully resolved NMR signals of phenolic protons, allowing the unambiguous structural determination of six reaction products, one of the fractions containing two enantiomers.
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Mirror symmetry is among the most fundamental concepts of physics and its spontaneous breaking at the molecular level allows chiral molecules to exist in two enantiomers that are mirror images of each other.
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Linalool has two enantiomers with distinct flavors and odors which affect product quality.
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Similarly, the dielectric constants of the two enantiomers exhibit remarkable step-like anomalies around the phase transition temperatures.
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We consider a collection of Brownian particles, which can stay in any of the three possible isomeric states: one achiral and two enantiomers.
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All contain a chiral center resulting in the formation of two enantiomers (R and S) of each profen.
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Chiral anesthetics possess a stereogenic center in their molecules and thus exist as two enantiomers (S)-(+) and (R)-(–).
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In this paper, we demonstrate a new variant of continuous-wave cavity-enhanced polarimetry for detecting the optical activity of two enantiomers of a chiral molecule at 730 nm.
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Also, the interaction energy difference between two enantiomers interacting with inside and outside of the BNNT was about 0.
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Compound 1 was isolated as a racemic mixture, and two enantiomers (1a and 1b) were successfully separated by chiral-phase preparative HPLC.
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Herein, we present the biological evaluation of the two enantiomers of [18F]GE387, which we have previously shown to have low sensitivity to this polymorphism.
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The electrochemical responses towards the two enantiomers were analyzed via cyclic voltammetry (CV), electrochemical AC impedance method (EIS), and differential-pulse voltammetry (DPV).
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Efficient access to two enantiomers of one chiral compound is critical for the discovery of drugs.
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2HG carries an asymmetric carbon atom in its carbon backbone and therefore occurs in two enantiomers, D-2-hydroxyglutarate (D-2HG) and L-2-hydroxyglutarate (L-2HG).
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It is known that THP has two enantiomers, naturally coexisting in YHS as a racemic mixture, so we prepared THP twice and subsequently performed chiral separation analysis by supercritical fluid chromatography.
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Two enantiomers (1a and 1b) were successfully separated by chiral chromatographic column and their absolute configurations were assigned by the comparison of experimental and calculated ECD data.
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Since the commercial mixture of BF is an isomer-enriched product containing two enantiomers (1R-cis-BF and 1S-cis-BF), enantioselective metabolism was also evaluated.
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In contrast, the classical spectra of the two enantiomers, where the broadband signal photon is frequency-uncorrelated with the idle one, become indistinguishable in the strong dissipation region.
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Detailed studies of 1 reveal an intriguing structure featuring a planar CNHC-Si-C-N skeleton with a V-shaped geometry at the dicoordinated Si0 center, a slightly bent Si═C═N core, a CNHC-Si-CCNR 3c-2e out of plane π-bond (HOMO), and an anticlinal conformation of the SIDipp and ArMes substituents leading to axial chirality and the presence of two enantiomers, (Ra)-1 and (Sa)-1.
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In this work, we explored the structural interactions between the main different structural components in Gram-negative/Gram-positive bacteria and the two enantiomers of a designer AMP, GL13K.
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