Abstract
Progress in chemical evaluation of six crude drugs, Paeoniae Radix, Rhei Rhizoma, Astragali Radix, Cnidii Rhizoma, Angelicae Radix and Gardeniae Fructus, is briefly summarized. Information on preparation methods, storage conditions, origin and the production areas of the crude drugs, were obtained by various chemical evaluation techniques. Moreover, these methods were also useful in establishing cultivation techniques and breeding new strains of medicinal plants.
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