Figure 2.

The typical ¹H NMR spectra of stomach, liver, and kidney of rat. (1, isoleucine; 2, leucine; 3, valine; 4, 3-hydroxybutyrate; 5, methylmalonate; 6, lactate; 7, alanine; 8, lysine; 9, ornithine; 10, acetate; 11, glutamate; 12, glutamine; 13, methionine; 14, glutathione; 15, succinate; 16, citrate(M); 17, aspartate; 18, dimethylamine; 19, methylguanidine; 20, N-methylhydantoin; 21, asparagine; 22, creatine; 23, creatinine; 24, ethanolamine; 25, choline; 26, phosphocholine; 27, phosphoethanolamine; 28, glycerophosphocholine; 29, acetylcholine; 30, betaine; 31, trimethylamine-N-oxide; 32, taurine; 33, inositol; 34, methanol; 35, scyllo-inositol; 36, glycine; 37, glycerol; 38, glycogen; 39, N, N-dimethylglycine; 40, serine; 41, phosphocreatine; 42, glucaric acid; 43, adenosine monophosphate; 44, inosine; 45, adenosine; 46, β-glucose; 47, α-glucose; 48, allantoin; 49, uracil; 50, uridine; 51, NADP+; 52, cytidine; 53, fumarate; 54, tyrosine; 55, histidine; 56, tryptophan; 57, nicotinamide; 58, phenylalanine; 59, xanthine; 60, hypoxanthine; 61, formate).