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In-electrospray (ESI) hydrogen/deuterium exchange–mass spectrometry (HDX-MS) has been used to characterize solvated carbohydrate structures. However, the rapid exchange rate of hydroxyls, as well as variations in source conditions and ambient humidity, alter the extent of forward and back exchange, resulting in poor repeatability when quantifying D-uptake on different days. Herein, we compare two...
The 3- and 21-monosulfates of pentadeuterated 5β-tetrahydrocorticosteroides were synthesized, starting from cortisol and 11-deoxycotisol. The principal reactions used were (1) perdeuteration of the methylene groups adjacent to the 3-oxo group of 17,20:20,21-bismethylendioxy-5β-3-ketosteroids with NaOD in CH 3 OD followed by stereoselective reduction with NaBD 4 , (2) sulfation of hydroxy...
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