Methods The chromatographic conditions included a column YWG C18, mobile phase: methanol-water ( 50 ∶ 50), adjusting to pH 3.0 by 0.3% triethylamine solution and phosphoric acid, flow rate 1 ml/ min, and wavelength 230 nm.

  • 流动相为甲醇-水(50∶50,含0.3%三乙胺,磷酸调pH3.0);流速1ml/min;

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