Fig. 1

Quantitative screening chromatogram of phenolic acids in the ethanol extract of the SP by LC–MS/MS. 1: Quinic acid, 4: Gallic acid, 6: Protocatechuic acid, 9: Chlorogenic acid, 10: Protocatechuic aldehyde, 17: Caffeic acid, 25: Ferulic acid-D3-IS^h, 29: Salicylic acid, 30: Cynaroside, 32: Rutin-D3-IS^h, 33: Rutin, 34: Isoquercitrin, 35: Hesperidin, 38: Rosmarinic acid, 40: Cosmosiin, 42: Astragalin, 43: Nicotiflorin, 47: Quercetin-D3-IS^h, 48: Naringenin, 50: Luteolin, 53: Apigenin, 54: Amentoflavone, 55: Chrysin and 56: Acacetin