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A chromato-spectrometric method has been developed for the quantitative determination of the biologically active alkaloid adlumine of pale corydalis which permits the determination of adlumine in the plant material with an accuracy of ±3.62% and of the isolated substance with an accuracy of ±0.79%.

A comparative chemical study of five species of corydalis (Corydalis roseaLeych.,C. giganteaTrautv. et Mey,C. vaginansRoyle,C. remotaFisch., andC. marschallianaPers.) has shown that important characteristics of the individual species are not only the type but also the particular composition of the alkaloids within each group and, in particular, the presence of certain characteristic signs connected with the biosynthesis of the alkaloids such as 13-methyl derivatives, phenolic compounds, racemic forms, etc.