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HPLC chromatograms of a standard mixture of scutellarin, apigenin-7-O-glucuronide, and rosmarinic acid, and Perilla frutescens leaf extract obtained using a YMC Triart C18 column monitored at 254 nm of peak area, 30 min of run time, 1.0 mL/min of flow rate. Peaks of scutellarin, apigenin-7-O-glucuronide, and rosmarinic acid are indicated with circled numbers “1”, “2”, and “3”, respectively.
