Abstract
Bioactive plant secondary metabolites tend to occur in complex mixtures in botanical drugs (phytopharmaceuticals), and the design of procedures for the analysis of such compounds requires a thorough understanding of the phytochemistry involved and considerable ingenuity on the part of the analyst. Several published chromatographic and chromatographic/spectroscopic analytical methods for three botanical products of commercial importance are reviewed, namely, those from Gingko biloba, Croton tiglium, and Stevia rebaudiana.
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