Mass spectrometry in structural and stereochemical problems–CXCIV: The mass spectrometric fragmentations of steroidal sapogenins
作者： William H. Faul , Carl Djerassi
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摘要: The characteristic mass spectral fragmentation patterns of the basic structure steroidal sapogenin, (25R)-5α-spirostan, have been elucidated through preparation analogs with deuterium labels at positions 11, 12, 14, 15, 16, 17, 20, 21, 23, 24, 25, 26 and 27. In addition, effects a change stereochemistry 14 introduction oxygencontaining functionalities mostly in ring F, incorporation olefinic unsaturation determined synthesis many examples.
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