positional isomer


Also found in: Medical.

positional isomer

[pə′zish·ən·əl ′ī·sə·mər]
(chemistry)
One of a set of structural isomers which differ only in the point at which a side-chain group is attached.
(organic chemistry)
Constitutional isomer having the same functional group located in different positions along a chain or in a ring.
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References in periodicals archive ?
Attorney's Office reports that the former University of Florida wide receiver pleaded guilty Wednesday to conspiracy to possess with intent to distribute a positional isomer of butylone, also known as ethylone, and commonly marketed as the street drug ''Molly.
In this work, the effects of a pair of positional isomer of ganoderic acids (GAs), namely ganoderic acid Mf (GA-Mf) and ganoderic acid S (GA-S) purified from the fermented mycelia of Ganoderma lucidum, on induction of cell apoptosis and the apoptotic pathway in HeLa cells were investigated.
This library is comprised of more than 350 synthetic cannabinoid standards, including parent compounds and their positional isomers, analogs, and homologs.
The process avoids random conjugation of ADC payload, which would result in multiple positional isomers with potentially different bioactivity, pharmacokinetics, distribution, immunogenicity, safety, and stability profiles.
Golovnya, Peculiar Features of Sorption of Positional Isomers of Formyl-, Acetyl-, and aminopyridines in Capillary Gas-Liquid Chromatography, Russ.

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