To access the data, click or select the words “Appendix 1.” Diagrams (a-c) showed the stability of the chromatography system. The retention times of metabolites at early (1.6 min), middle (13.5 min), and late stage (28.9 min) of the elution profile from different samples are stable. The RSD of retention time is from 0.03 – 1.1%, n=24.