Investigation and identification of the multiple components of Rheum officinale Baill. using ultra-high-performance liquid chromatography coupled with quadrupole-time-of-flight tandem mass spectrometry and data mining strategy - Yao, M; Li, J M; He, M Z; Ouyang, H; Ruan, L L; Huang, X F; Rao, Y F; Yang, S L; Zhou, X; Bai, J Q (J Sep Sci, 2021)