Table 1.
1H and 13C-nuclear magnetic resonance (NMR) spectral values of 4′-substituted benzoyl-β-D glycoside (Tb-01).
| Position of proton | Nature of proton |
δH (ppm) |
δC (ppm) | |
|---|---|---|---|---|
| α | β | |||
| C1 | C | – | – | 146.49 |
| C2 | CH | 7.52 (m) | – | 139.69 |
| C3 | CH | 7.08 (m) | – | 123.48 |
| C4 | CH | 6.98 (m) | – | 110.43 |
| C5 | CH | 7.05 (m) | – | 118.37 |
| C6 | CH | 7.46 (m) | – | 122.06 |
| C7 | C=O | – | – | 170.51 |
| C1′ | CH | 4.67 (d, J = 7.2 Hz) | – | 90.31 |
| C2′ | CH | 4.38 (m) | – | 75.08 |
| C3′ | CH | 3.74 (m) | – | 69.84 |
| C4′ | CH | 4.04 (m) | – | 73.97 |
| C5′ | CH2 | 3.56 (d, J = 4.8 Hz) | 3.52 (d, J = 5.7 Hz) | 64.51 |
| C1″ | CH3 | 0.86 (t, J = 6.5 Hz) | – | 13.18 |
| C2″ | CH2 | 1.19 (m) | 1.15 (m) | 22.03 |
| C3″ | CH2 | 2.58 (m) | 2.59 (m) | 46.34 |
| C4″ | CH2 | 2.50 (m) | 2.53 (m) | 30.16 |
| C5″ | CH2 | 2.56 (m) | 2.48 (m) | 36.27 |
| C6″ | CH2 | 2.11 (m) | 2.07 (m) | 38.89 |
| C7″ | CH | 2.90 (m) | – | 42.18 |
| C8″ | CH3 | 1.27 (d, J = 5.4 Hz) | – | 15.07 |
| C9″ | CH3 | 1.37 (d, J = 6.4 Hz) | – | 17.38 |
| C10″ | CH2 | 3.31 (d, J = 6.1 Hz) | 3.34 (d, J = 6.1 Hz) | 62.65 |