Nitraria schoberi nitrarine from

A group of alkaloids having a novel structure has been isolated from Nitraria schoberi. The structure of nitrarine (22) was determined by X-ray crystal structure analysis of its dihydrochloride.Nitramidine (23) is a didehydro-derivative, and can be obtained from nitrarine by mercuric acetate oxidation, and schoberidine (24) is... 

Two pentacyclic bases containing tryptamine units and a second nitrogen have been reported. The structure (18) for nitrarine, an optically inactive base from Nitraria schoberi, relies at the moment on spectral measurements. Elaeocarpidine, an optically inactive alkaloid which co-occurs with indolizidine alkaloids in Elaeocarpus densijiorus, has been examined fully and proved to have the structure (19). Central to the structure determination was a hydro-genolysis, in acid solution, of the N-C-N system to give dihydroelaeocarpidine... 

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See also in sourсe #XX -- [ , ]

See also in sourсe #XX -- [ , ]

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