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- W1965718773 abstract "Various types of alkaloids observed in several herbal medicines were analyzed by electrospray ionization tandemmass spectrometry in positive ion mode. In the present study, MS/MS spectralpatterns were investigated for eight-types of alkaloids(aporpine, protoberberine, tetrahydroprotoberberine, benzylisoquinoline, protopine, phthalide, morpine, and bisbenzylisoquinoline). For aporpine- and protoberberine-type alkaloids, main fragmentations occurred at substituted groups on rigid ringstructures, not showing ring fusion. Interesting fragmentations due to iminolization and retro-Diels-Alder (RDA) reaction wereobserved in MS/MS spectra of protopine- and tetrahydroprotobereberine-type alkaloids. Also, several types of fragmentationssuch as inductive cleavage and α-cleavage, or bond cleavage between two ring structures were observed depending on theirstructural characteristics. These fragmentation patterns are expected to allow instant classification of the specific alkaloid type invarious MS/MS spectra of alkaloids." @default.
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- W1965718773 date "2013-12-30" @default.
- W1965718773 modified "2023-10-03" @default.
- W1965718773 title "General Fragmentations of Alkaloids in Electrospray Ionization Tandem Mass Spectrometry" @default.
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- W1965718773 doi "https://doi.org/10.5478/msl.2013.4.4.79" @default.
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