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Chromatogram of high-performance liquid chromatography of You-Gui-Wan (YGW) decoction. HPLC was run on a Hitachi 5160; 5430 DAD with 5310 oven (40 °C); column: COSMOSIL 5C18-AR-II (250 × 4.6 mm); solvents: A, methanol; B, 0.1% H3PO3; mobile phase: 0–5 min, 15–20% A; 5–20 min, 20–60% A; 20–30 min, 60–80% A; 30–35 min, 80% A; 35–37 min, 80–15% A; detector: UV: 220 & 280 nm; flow rate: 1 mL/min. 1: gallic acid; 2: caffeic acid; 3: loganin; 4: cinnamaldehyde.
