TABLE 3.
Mean concentrations (M) and corresponding standard deviations (SD) of metabolites contained in aqueous cinnamon extracts dissolved in D2O as determined from 1H-NMR spectra. Concentrations of metabolites are expressed in mg/g of extract. M and SD of the extraction yields are also reported. Results are reported as the mean and SD of three independent experiments.
| CZH | CCH | BCH | ||||
|---|---|---|---|---|---|---|
| M | SD | M | SD | M | SD | |
| Acetate | 1.55 | 0.60 | 0.97 | 0.13 | 5.27 | 2.17 |
| Alanine | ND | ND | 0.44 | 0.06 | 1.76 | 0.29 |
| Benzoic acid | 1.04 | 0.51 | 0.40 | 0.01 | 1.29 | 0.22 |
| 2,3-Butanediol | 0.69 | 0.10 | 1.26 | 0.06 | 0.90 | 0.15 |
| (E)-Cinnamaldehyde | 16.29 | 1.14 | 19.40 | 10.63 | 21.06 | 5.73 |
| Cinnamic acid | 3.86 | 0.91 | 4.16 | 0.94 | 5.99 | 1.48 |
| Formate | 0.55 | 0.40 | 0.20 | 0.09 | 0.29 | 0.05 |
| Fructose | 31.98 | 8.80 | 46.44 | 6.19 | 45.82 | 9.55 |
| GABA (γ-Aminobutyric acid) | 6.21 | 0.91 | 3.29 | 0.65 | 5.21 | 1.13 |
| Galactose | 6.55 | 0.92 | 5.22 | 0.69 | 4.88 | 1.18 |
| Glucose | 40.88 | 6.95 | 69.50 | 11.31 | 60.89 | 10.21 |
| Malic acid | 34.69 | 11.48 | ND | ND | ND | ND |
| Myo-inositol | 41.22 | 12.06 | 39.44 | 1.98 | 48.52 | 11.77 |
| Quinic acid | 59.26 | 14.19 | 65.72 | 1.99 | 73.86 | 18.77 |
| Shikimic acid | ND | ND | 12.96 | 0.96 | 27.75 | 5.81 |
| Succinate | 3.41 | 0.79 | 2.47 | 0.35 | 2.26 | 0.45 |
| Sucrose | 7.09 | 0.16 | ND | ND | 5.15 | 1.72 |
| Extraction yield % | 4.43 | 0.82 | 10.01 | 1.71 | 13.07 | 1.96 |
ND: not detectable because under the detection limit or in a too crowded spectral area. BC: Cinnamomum cassia buds; CC: Cinnamomum cassia bark; CZ: Cinnamomum zeylanicum bark (CZ); H: aqueous extraction.