Research Article

An Aqueous Extract of Radix Astragali, Angelica sinensis, and Panax notoginseng Is Effective in Preventing Diabetic Retinopathy

Figure 1

Chemical standardization of RRP by HPLC fingerprint analysis. In the HPLC fingerprint at an absorbance of 203 nm, the peaks corresponding to calycosin (A), ginsenoside Rg1 (B), ligustilide (C), and ginsenoside Rb1 (D) were identified.
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