epimer

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Related to epimers: Mutarotation, Anomers

epimer

 [ep″ĭ-mer]
one of two or more optical isomers that differ only in the configuration around one asymmetric carbon atom. adj., adj epimer´ic.

ep·i·mer

(ep'i-mĕr),
One of two molecules (having more than one chiral center) differing only in the spatial arrangement about a single chiral atom, for example, α-d-glucose and α-d-galactose (with respect to carbon-4).
See also: sugars. Compare: anomer.
[epi- + G. meros, part]

epimer

/ep·i·mer/ (ep´ĭ-mer) either of two optical isomers that differ in the configuration around one asymmetric carbon atom.

ep·i·mer

(ep'i-mĕr)
One of two molecules (having more than one chiral center) differing only in the spatial arrangement about a single chiral atom.
See: sugars
Compare: anomer
[epi- + G. meros, part]

epimer

one of two or more isomers which differ only in the configuration about one carbon atom.
References in periodicals archive ?
Caption: Figure 2: Comparison of the separation of budesonide epimers with four different columns during method development.
The method is capable of accounting for the misleading measures due to the epimers and isobars.
C-3 epimers can account for a significant proportion of total circulating 25-hydroxyvitamin D in infants, complicating accurate measurement and interpretation of vitamin D status.
As it seems unlikely that the vitamin D sufficiency/insufficiency status of an individual would be altered by the presence of the epimer, it is not necessary to quantify the epimer in these subjects.
For newborns presenting with incomplete masculinization, this approach is not informative, since excretion of the THF and THB epimers (derived from cortisol and corticosterone, respectively) is negligible.
MJ was obtained from Bedoukian Research (Danbury, Connecticut), which we determined by GC-MS analysis to be close to the thermodynamic equilibrium for the epimers of MJ (Mueller and Brodschelm 1994): 90.
Different erythrinaline alkaloids have been isolated from the flowers and pods of Erythrina lysistemon, and among them the new compounds are (+)-11[beta]-hydroxyerysotramidine, (+)11[beta]-hydroxyerysotrine N-oxide (69), and two C-11 epimers (70 and 71), (+)-11[beta]-methoxyerysotramidine N-oxide (72), (+)-11[beta]-hydroxyerysotrine, and 11-dehydroerysotrine (73).
Coupling of the aldehyde (27) with metallylmagnesium chloride yielded the C-23 hydroxy derivative as an epimeric mixture, which was separated into the epimers (28a and 28b) in the form of 3,23-dibenzoate (R=Bz).
Stereoselective total synthesis of (+)-oploxyne A, (--)-oploxyne B, and their C-10 epimers and structure revision of natural oploxyne B.