Mass spectrometry has been employed for the characterization of diastereoisomeric isoquinoline alkaloids. Electrospray ionization was used to generate MH(+) ions, and multistage collisionally activated spectra allowed differentiation among the different compounds via specific fragmentation patterns, whose mechanisms have also been elucidated by accurate mass measurements.
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Gioacchini et al. (2000) studied this question.
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