Veratrum alkamines, structure

The alkamines isolated directly from plant material or obtained by acid or enzymatic hydrolysis of naturally occurring glycosides between 1967 and 1979 are summarized in Table III. Physical me ods are of increasing importance in structure elucidation. Recent papers have dealt with IR spectra (173), H NMR (174,175), NMR (176-178,357,358), EPR (179), ORD (180-183), and MS (184,351,352) of Solanum alkamines. Some X-ray analyses have been carried out since 1967 (58, 81, 149, 185-189, 359). Tables rV-VI survey the characteristic features of H NMR, NMR, and MS of Solanum alkaloids. Silver nitrate-containing adsorption layers were shown to be useful in TLC separation of 5a-saturated and S-unsaturated alkamines (194,195). High-pressure liquid chromatography has been applied successfully for the separation of steroidal Solanum and Veratrum alkamines (373). 

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