Alkaloids Related to Corydaline

The alkaloid, C21H23O4N (mp 144°-146° [a]n + 306°) (in CHCI3), was isolated by Taguchi and Imaseki 10) from Corydalis ambigua Cham, et Schleet. var. amurensis Maxim. Its UV-spectrum, which exhibited a single maximum at 286 m/x (log 3.82), suggested its representation as a 

CORYSAMINE AND THE ALKALOIDS OF Corydalis incisa (Thunb) Pers. 

In study of Corydalis incisa cultivated in North America, Manske reported the presence of five alkaloids, protopine, bicuculline, cory-palmine, and an alkaloid of unknown structure designated as alkaloid F62 17). 

A more recent investigation 15,16) of the same species, but of Japanese origin, has afforded five new tertiary bases (see Table II), a new quartern-ary alkaloid, corysamine, and the known alkaloids protopine, sanguinar-ine, and coptisine. With the exception of corynoline (base I), which has 

New Tertiary Alkaloids or Corydalis incisa (Thumb.) Pers. 

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