Simultaneous Determination of Catalpol, Aucubin, and Geniposidic Acid in Different Developmental Stages of Rehmannia glutinosa Leaves by High Performance Liquid Chromatography

Figure 1

HPLC-UV chromatographs of standard mixture ((a), (b)) and R. glutinosa extract ((c), (d)).

(a)

(b)

(c)

(d)