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. 2021 Jan 10;13(3):3798–3818. doi: 10.18632/aging.202340

Table 3. 1H NMR assignments of major metabolites from fecal samples of rats.

NO. Metabolites δ 1H (multiplicity a) NO. Metabolites δ1H (multiplicity a)
1 Butyrate 0.90(t), 2.16(t), 1.56(m) 24 Citrate 2.54(d), 2.67(d)
2 Isoleucine 0.96(t), 1.01(d), 1.27(m), 3.65(d) 25 Methylamine 2.61(s)
3 Leucine 0.97(t), 1.69(m), 3.72(t) 26 Aspartate 2.66(dd), 2.80(dd), 3.91(dd)
4 Valine 0.99(d), 1.04(d), 2.27(m), 3.62(d) 27 Asparagine 2.87(m), 3.03(m), 4.00(m)
5 Propionate 1.06(t), 2.17(q) 28 Creatinine 3.04(s), 3.96(s), 4.05(s)
6 Ethanol 1.18(t), 3.66(q) 29 Phenylalanine 3.17(dd), 3.33(m), 3.51(s), 3.99(dd), 7.33(t), 7.38(m), 7.43(t)
7 Lactate 1.32(d), 4.13(q) 30 Choline 3.21(s)
8 Threonine 1.34(d), 3.59(d), 4.26(m) 31 Carnitine 3.23(s)
9 Lysine 1.47(m), 1.72(m), 1.89(m), 3.01(t), 3.76(t) 32 Taurine 3.25(t), 3.41(t)
10 Alanine 1.48(d), 3.81(q) 33 Glucose 3.25(t), 3.42(dd), 3.47(dd), 3.54(dd), 3.75(m), 3.84(m), 3.91(dd), 4.65(d), 5.24(d)
11 Citrullinine 1.56(m) 34 TMAO c 3.26(s)
12 Arginine 1.72(m), 1.90(m), 3.25(m), 3.76(m) 35 Betaine 3.26(s), 3.90(s)
13 Acetate 1.92(s) 36 Scyllo-Inositol 3.37(s)
14 Proline 2.05(m), 2.36(m), 3.35(t), 3.42(t), 4.12(m) 37 α-xylose 3.55(dd), 3.67(m), 5.21(t)
15 N-acetyl-GT b 2.06(s) 38 Glycine 3.55(s)
16 Methionine 2.14(s), 2.17(m), 2.64(t), 3.77(m) 39 Mannitol 3.77(dd)
17 Glutamine 2.15(m), 2.46(m), 3.77(m) 40 Glycolate 3.93(s)
18 Acetone 2.21(s) 41 Allantoin 5.39(s)
19 Acetoacetate 2.30(s) 42 Uracil 5.81(d), 7.54(d)
20 Pyruvate 2.35(s) 43 Fumarate 6.53(s)
21 Glutamate 2.36(m), 2.06(m), 3.78(m) 44 Tyrosine 6.90(d), 7.2(d)
22 Succinate 2.39(s) 45 Hypoxanthine 8.2(s), 8.22(s)
23 2-oxoglutarate 2.45(t), 3.02(t) 46 Formate 8.46(s)
a: s, singlet; t, triple; q, quartet; m, multiple b: N-acetyl-glycoprotein c: Trimethylamine-N-oxide.