positional isomer

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positional isomer (p·ziˑ·sh·nl īˑ·s·mer),

n one of two or more compounds with identical chemical composition but having a different functional group location. See also isomerism.
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In this work, a pair of positional isomer of GAs, GA-Mf and GA-S, were separated from fermented mycelia of the mushroom.
1987), is a collective term which indicates geometric (cis, trans) and positional isomers (7,9; 8,10; 9,11; 10,12; 11,13; 12,14) of cis-9, cis-12-octadecadienoic acid (C18:2n-6) (Figure 1).
3+]-labeled toxin was analyzed by reversed-phase HPLC, and several positional isomers were detected (Fig.
In fact, the patented discovery is that, in omeprazole, two positional isomers are present in the solid state in ratios to one another that vary with the method of manufacture.
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