Figure 2.
HPLC chromatograms of five standards (A, 1 mg/mL); and the DN (B, 40 mg/mL), DQ (C, 40 mg/mL) and DS (D, 40 mg/mL) samples. DN: Dioscorea nipponica; DQ: Dioscorea quinquelobata. DS: Dioscorea septemloba.
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