Table 1 1H (500 Hz) and 13C (100 Hz) -NMR data of compounds (1 & 2) isolated from the Ethyl acetate fraction of P. dulce leaves (DMSO-d6).
Compound no. | Compound (1) Afzelin | Compound (2) Fisetin 3-O-rhamnoside | ||
|---|---|---|---|---|
Carbon no. | 1H-NMR (ppm), J in Hz | 13C-NMR (ppm) | 1H-NMR (ppm), J in Hz | 13C-NMR (ppm) |
2 | – | 157.7 | – | 153.6 |
3 | – | 134.7 | – | 139.6 |
4 | – | 178.2 | – | 175.8 |
5 | 12.59 (s, OH) | 161.8 | 7.94 (d, 1 H, J = 2.3) | 118.2 |
6 | 6.38 (brs, 1 H) | 99.2 | 7.51 (dd, 1 H, J = 8.8, 2.2) | 128.2 |
7 | 10.84 (s, OH) | 164.7 | 10.49 (s, OH) | 167.32 |
8 | 6.18 (brs, 1 H) | 94.2 | 7.72 (d, 1 H, J = 2.1) | 107.07 |
9 | – | 157.03 | – | 162.3 |
10 | – | 104.69 | – | 116.3 |
1ʹ | – | 121 | – | 135 |
2ʹ | 7.71 (d, 2 H, J = 6.5 Hz) | 131.1 | 7.10 (d, 1 H, J = 2.1) | 131.4 |
3ʹ | 6.89 (d, 2 H, J = 7 Hz) | 115.9 | 9.05 (s, OH) | 147.8 |
4ʹ | 10.18 (s, OH) | 160.5 | 9.66 (s, OH) | 150 |
5ʹ | 6.89 (d, 2 H, J = 7 Hz) | 115.9 | 7.10 (d, 1 H, J = 2.1) | 114.5 |
6ʹ | 7.71 (d, 2 H, J = 6.5 Hz) | 131.1 | 7.99 (dd, 1 H, J = 7.8, 2.7) | 120.05 |
1″ | 5.27 (brs, 1 H) | 102.3 | 5.51 (d, 1 H, J = 2.2) | 102 |
2″ | 3.96 (s) | 70.9 | 4.16 (s, 1 H) | 72.5 |
3″ | 3.08 (m) | 71.14 | 3.79 (s, 1 H) | 67.6 |
4″ | 71.69 | 3.63 (s, 1 H) | 71.13 | |
5″ | 70.62 | 3.17 (s, 1 H) | 71.6 | |
6″ | 0.77 (d, 3 H, J = 5.7 Hz) | 17.9 | 1.11 (d, 3 H, J = 6.5 ) | 17.46 |
