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- W1971004370 abstract "The mass spectra of 2,2′-anhydrouridines substituted in the 3′ and 5′ positions were studied. When the substituents were acetyl, pivaloyl, trifluoroacetyl or trimethylsilyl, it was found that specific fragmentations occured which could identify the position of the substituent. The specific fragmentations often resolve earlier ambiguities in the interpretation of mass spectra of 2,2′-anhydropyrimidine derivatives. Mono-acetyl and mono-pivaloyl 2,2′-anhydrouridines are not easily distinguished because of thermal reactions in the sample probe. They may be readily distinguished, however, by acetylation (with acetic anhydride-d6 for the mono-acetyl isomers), trifluoroacetylation or trimethylsilylation, followed by mass spectral analysis of the reaction product." @default.
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- W1971004370 date "1973-03-01" @default.
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- W1971004370 title "The study and characterization of nucleosides by mass spectrometry—II: Comparisons between the mass spectra of 3′,5′-substituted, isomeric pairs of 2,2′-anhydrouridines" @default.
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- W1971004370 doi "https://doi.org/10.1002/oms.1210070310" @default.
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