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Steroidal alkaloids, mass spectra

B. Alkaloids Aminated at C-20.— The i.r. spectrum of cyclomikuranine (204), isolated from B. microphylla, shows a six-membered-ring ketone, and the mass spectrum shows a 20-dimethylamino-group. The negative Cotton curve is typical of a 4,4-dimethyl-3-oxo-5a-steroid. N.m.r. indicates an NMc2 group as well as a 16a-OH group. [Pg.427]

See other pages where Steroidal alkaloids, mass spectra is mentioned: [Pg.403]    [Pg.234]    [Pg.238]    [Pg.409]    [Pg.23]    [Pg.244]    [Pg.248]    [Pg.204]    [Pg.109]   
See also in sourсe #XX -- [ Pg.7 ]



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