Fig. 3

Chemical profiles of SZDTD by UPLC-Q-TOF MS. (A) Positive mode. (B) Negative mode. The main components of SZDTD were identified as follows: DL-Stachydrine, N-(2,4-Dimethylphenyl)formamide, Naringin, 18-β-Glycyrrhetinic acid, Nobiletin, Tangeritin, D-(-)-Quinic acid, Eriocitrin, Hydroxyferulic acid, apigenin-7-O-glucuronide.