THE precipitate formed between organic basic substances and Dragendorff's reagent is influenced by the valency of the basic nitrogen atom and by hydrophilic groups, such as carboxyl, hydroxyl, etc. 1.

IN an earlier communication on alkaloids in germinating seeds of Atropa belladonna 1, we mentioned that a new alkaloid was the first to appear on paper chromatograms using Dragendorff's reagent. As ...