Positive and negative ion mass spectrometry of antiepileptic hydantoins and their analogs

@article{Ishikawa1988PositiveAN,
  title={Positive and negative ion mass spectrometry of antiepileptic hydantoins and their analogs},
  author={Yoichi Ishikawa and Osamu Suzuki and Hideki Hattori and Takeshi Kumazawa and Toru Takahashi},
  journal={Zeitschrift f{\"u}r Rechtsmedizin},
  year={1988},
  volume={99},
  pages={253-261}
}
Positive ion electron impact (PIEI), positive ion chemical ionization (PICI), and negative ion chemical ionization (NICI) mass spectra of seven compounds of hydantoins and their analogs are presented; their probable fragmentation modes are also presented. In the PIEI mode, intensities of molecular ions differed according to different compounds. Cleavage at outsides of both carbonyl groups was commonly observed for all compounds. In the PICI mode, all compounds showed [M+1]+ quasi-molecular ions… CONTINUE READING

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