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Representative 1H NMR spectra of rat serum from SY group (A), model group (B), and normal group (C) with metabolites labeled. TMAO, trimethylamine N-oxide; OAG, O-acetyl glycoproteins; NAG, N-acetyl glycoproteins; L1~L2, LDL/VLDL; L3~L6, lipids; PC, phosphorylcholine.
