W i l l s t a t t e r . G a d a m e r and v o nhas also altered his former opinion regarding the (3.y-position of the double bond, but W i l l s t a t t e r has not discussed his former arguments.At the request of G a d a m e r , K. v o n A u w e r s s ) has investigated a great number of tropane derivatives spectrochemically and he also found that "sich die Doppeltbindung von Anhydroecgonin in a-Stellung zum Carbonyl befindet".
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