Table 2 ¹H NMR assignment of metabolites in Chardonney dry white wine

1

Valine

0.90(d, C4H₃), 1.02(d, C5H₃)

2

Ethanol

1.19(t, C2H₃), 3.67(q, C1H₂)

3

Acetic acid

2.07(s, C2H3)

4

2,3-butanediol

1.16(d, C1H₃ + C4H3)

5

Succinic acid

2.68(s, C2H₂ + C3H₂)

6

Proline

2.00(m, γ-CH₂), 2.07(m, β-CH), 2.35(m, β’-CH), 3.35(m, δ-CH), 3.40(m, δ-CH), 4.13(m, α-CH)

7

Ethyl acetate

1.26(t, C4H₃), 4.18(q, C3H₂)

8

Tartaric acid

4.57(s, C2H + C3H)

9

α-Glucose

5.25(d, αC1H)

10

β-Glucose

4.64(d, βC1H)

11

Lactic acid

1.42(d, C3H₃), 4.29(m, C2H)

12

Gallic acid

7.15(s, C2H + C6H)

13

Glycerol

3.58 (q, C2H₂), 3.67(q, C3H₂), 3.81(m, C1H)

14

Citric acid

2.82(d, C2H_a + C4H_a), 2.94(d, C2H_b + C4H_b)

15

Choline

3.20(s, N-CH₃), 3.52(t, αCH₂), 4.09(t, βCH₂)

16

α-d-Glucuronic acid

5.35(d, C1H)

17

Malic acid

2.78(dd, βCH₂), 2.90(dd, β’CH₂), 4.50(q, CH)

18

Alanine

1.52(d, βCH₃₎

19

d-Sucrose

5.41(d, C1H), 3.55(dd, C2H), 3.72(dd, C3H), 3.90(dd, C4H), 4.215(d, C1′H), 4.05(dd, C2′H), 3.88(dd, C3′H)

20

Tyrosine

6.86(d, C2H), 7.19(d, C3H)