17-Epimerization of 17α-methyl anabolic steroids in humans: metabolism and synthesis of 17α-hydroxy-17β-methyl steroids
作者:Willi Schänzer、Georg Opfermann、Manfred Donike
DOI:10.1016/0039-128x(92)90023-3
日期:1992.11
chromatography as trimethylsilyl derivatives from a capillary SE-54 or OV-1 column 70-170 methylen units before the corresponding 17 alpha-methyl epimer. The electron impact mass spectra of the underivatized and trimethylsilylated epimers are in most cases identical and only for I, II, and V was a differentiation between the 17-epimers possible. 1H nuclearmagneticresonance (NMR) spectra show for the 17 beta-methyl