Partial 600 MHZ 1H NMR spectra of serum samples for rat with ischemia/reperfusion. Sham group (A), MCAO groups (B for MCAO0, C for MCAO0.5, D for MCAO1, E for MCAO3, F for MCAO6, G for MCAO12 and H for MCAO24.). The metabolites quantified in Table 1 are assigned as: 1. L-Valine; 2. L-Alanine; 3. L-Lactic acid; 4. Ornithine; 5. Acetic acid; 6. Glutamic acid; 7. Succinic acid; 8. Pyruvic acid; 9. Citric acid; 10. Malonic acid; 11. Betaine; 12. Glycine; 13. L-Serine.