Names and associated metabolic pathways for the identified metabolites in increasing order of their VIP values.

*Metabolites were identified by interpreting their fragmentation patterns (MS/MS spectra) and conducting a database search. LysoPC, lysophosphatidylcholine; PC, phosphatidylcholine; CDP, cytidine-5′-diphosphate; APGPR, Ala-Pro-Gly-Pro-Arg. **Human Metabolome Database. aVariable importance in the projection. All abbreviations used for pathways and reactions are from KEGG identifiers (http://www.genome.jp/kegg/kegg3.html).