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.
References in periodicals archive ?
Because of the four chiral carbons present in its structure, TBECH can exist in four diastereoisomeric forms ([alpha], [beta] [gamma], and [delta]).
The isolated components were identified as four diastereoisomeric pairs of 9, 12, 13-trihydroxy-trans- 10, cis-15-octadecadienoic acid; 12, 15, 16-trihydroxy-cis-9, trans-13-octa-decadienoic acid; 9, 10, 13-trihydroxy-trans-11, cis-15-octadeca-dienoic acid; and 12, 13, 16-trihydroxy-cis-9, trans-14-octadeca- dienoic acid.
15) In this example the two diastereoisomeric forms of the antibiotic cefuroxime axetil ester are separated from their major hydrolysis product (cefuroxime).