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- W2057809013 abstract "The utility of an atmospheric pressure chemical ionization interface for distinguishing sterioisomers has been demonstrated. Two geometrical isomers of the pharmaceutical eprosartan ((E,Z)-3-[butyl-1-(4-carboxybenzyl)-1H-imidazole-5-yl]-2[2-thienyl)methyl]propenoic acid) were investigated in the positive- and negative-ion modes with in-source collision-induced dissociation (CID). In positive-ion mode, CID spectra display significant differences between the two isomers. Under identical collisional conditions several fragment ions present in the CID spectrum of the E isomer (SK&F 108566) are significantly suppressed in the spectrum of the Z isomer (SB 206328). Analysis of the fragmentation patterns of both isomers indicates that a pathway initiated by the loss of neutral thiophene from the E isomer is inhibited in the CID spectra of the Z isomer. In negative-ion mode, fragmentation and corresponding differences in spectra are not observed. Fragmentation is observed to result primarily from the ionization process. © 1997 John Wiley & Sons, Ltd." @default.
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- W2057809013 date "1997-08-30" @default.
- W2057809013 modified "2023-10-16" @default.
- W2057809013 title "Differentiation of Two Geometric Isomers of the Pharmaceutical Eprosartan Using Atmospheric Pressure Chemical Ionization" @default.
- W2057809013 doi "https://doi.org/10.1002/(sici)1097-0231(19970830)11:13<1430::aid-rcm7>3.0.co;2-5" @default.
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