diastereoisomer


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diastereoisomer

[¦dī·ə‚ster·ē·ō′ī·sə· mər]
(organic chemistry)
One of a pair of optical isomers which are not mirror images of each other. Also known as diastereomer.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The diastereoisomer (5.21 g, 0.005 M) obtained was added with stirring to an aqueous slurry of potassium chloride (0.52 g, 0.005 M).
To test it, we converted free energies of formation of both (HB-O and HB-N) forms of competing diastereoisomers to percentage distribution.
It is noteworthy that the majority diastereoisomer formed was the same in the case of the reaction catalyzed by TEBAC.
Huang, Complete NMR spectral assignments of two new iridoid diastereoisomers from the flowers of Plumeria rubra L.
However, indirect chiral separation can be achieved by converting enantiomers to diastereoisomers via derivatization reaction of the targeted compounds with optically pure chiral derivatizing agents (CDAs) [9].
2-methylcitrate elutes as a double peak, representing diastereoisomers. Propionylglycine excretion is variable in PA.
This compound is a racemic mixture, and investigations have demonstrated that both diastereoisomers have similar activity in vitro against Plasmodium.
Importantly, until recently SAM-e's benefit was virtually unknown, due to it is extreme instability at temperatures above 0[degrees] C, or in the presence of moisture, "both as degradation of the active ingredient intended as the sum of the two diastereoisomers, and as transformation of active (SS)-(+)-S-adenosyl-L-methionine into inactivate (RS)-(+)-S-adenosyl-L-methionine (racemisation of the substance)." (13)
Silybin makes up more than 50% of silymarin and is made up of a mixture of two diastereoisomers, silybin A and silybin B.
Xie et al., "Determination of hexabromocyclododecane diastereoisomers in Sargassum fusiforme and comparison of the extraction efficiency of ultrasonication, microwave-assisted extraction, Soxhlet extraction and pressurised liquid extraction," Journal of Separation Science, vol.