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- W2016306883 abstract "The mass spectra of the new piperidyl-PGA (TMS), derivatives, formed by reaction of prostaglandin A1 or A2 with BSTFA/piperidine, are characterized by a dominant M − 173 ion, remarkably specific for MID applications. Similar derivatives have also been obtained with mixtures of BSTFA and other heterocyclic amines (hexamethylenimine, pyrrolidine, morpholine and propylenimine), which give the respective heterocycle-PGA (TMS), derivatives. Likewise, the corresponding 11-piperidyl-19-OH-PGA (TMS)4 seem specially suited for the selected ion detection of PGA “artifacts” in extracts of human semen. The postulated structure of fragments at M − 173 and M − 423 (series I) and M − 425 (series II) is in favour of a pushpull type of reaction mechanism leading to these derivatives by nucleophilic addition of the amine on the C-11 atom of the PGA's and concurrent formation of an enolate ion from the 9-keto group with silanization of all reactive groups by BSTFA. An example of an application to the determination of PGA's and 19-OH-PGA's in a biological extract is given." @default.
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- W2016306883 title "Mass Spectrometric Identification of New Derivatives of PGA's and 19-hydroxy-PGA's Specific for Multiple Ion Detection" @default.
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- W2016306883 doi "https://doi.org/10.1002/ijch.197800029" @default.
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