epimer

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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]

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]
References in periodicals archive ?
Jiang, Effect of 20(S)-protopanaxatriol and its epimeric derivatives on myocardial injury induced by isoproterenol, Arzneimittelforsch., 61 , 148 (2011).
Although it was eluted as a single product even in HPLC, its identification as a diastereomeric mixture (epimeric at C2) of 2,3-dihydroamentoflavone (2) became apparent from spectroscopic analysis (Ohmoto et al.
Second, vitamin D metabolites with an epimeric orientation of the carbon C3 hydroxyl group of the A ring had a substantially reduced affinity for the antibody, suggesting that this part of the molecule was important for specific binding.
Two new epimeric isopavine N-oxides, amuresinine N-oxide A (14) and B (15), were isolated from Meconopsis horridula var.
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).
Pizzolatti MG, Venson AF, Smania Junior A, Smania EF, Braz-Filho R (2002) Two Epimeric Flavolignans from Trichilia catigua (Meliaceae) with Antimicrobial Activity.