Table 1.
1H and 13C NMR data of compounds 1 and 4 (in CDCl3).
| Position | 1 | 4 | |||
|---|---|---|---|---|---|
| δ C | δH (J in Hz) | δ C | δH (J in Hz) | ||
| 1 | 8.84 s | 8.71 s | |||
| 2 | 132.7 | 132.4 | |||
| 3 | 194.0 | 192.5 | |||
| 5a | 60.7 | 2.08 d (11.7) | 65.1 | 2.42 d (11.0) | |
| 5b | 3.46 d (11.7) | 2.81 dd (11.0, 1.5) | |||
| 6a | 31.7 | 2.81 d (15.8) | 29.3 | 3.67 d (17.7) | |
| 6b | 3.49 d (15.8) | 3.75 d (17.7) | |||
| 7 | 119.4 | 122.3 | |||
| 8 | 127.4 | 128.3 | |||
| 9 | 120.1 | 7.55 d (8.2) | 120.1 | 7.71 d (8.0) | |
| 10 | 120.6 | 7k.13 t (8.2) | 121.4 | 7.13 t (8.0) | |
| 11 | 126.5 | 7.33 t (8.2) | 126.6 | 7.33 t (8.0) | |
| 12 | 112.2 | 7.39 d (8.2) | 111.8 | 7.34 d (8.0) | |
| 13 | 136.5 | 136.5 | |||
| 14a | 36.6 | 2.49 dd (15.5, 10.5) | 43.2 | 2.89 d (5.2) | |
| 14b | 2.60 d (15.5) | ||||
| 15 | 36.2 | 2.57 dd (10.5, 4.5) | 41.0 | 2.23 dd (10.5, 5.2) | |
| 16 | 49.3 | 51.0 | |||
| 18 | 11.4 | 0.88 t (7.4) | 10.7 | 0.86 t (7.4) | |
| 19a | 23.9 | 1.37 m | 23.8 | 1.63 m | |
| 19b | 1.21 m | ||||
| 20 | 39.1 | 1.85 m | 37.8 | 1.72 m | |
| 21a | 57.5 | 1.57 d (10.9) | 60.4 | 1.78 d (10.9) | |
| 21b | 2.64 dd (10.9, 3.8) | 2.86 dd (10.9, 3.7) | |||
| N-CH3 | 46.3 | 2.31 s | 46.3 | 2.32 s | |
| COOCH3 | 52.4 | 3.51 s | 52.1 | 3.51 s | |
| COOCH3 | 175.5 | 175.7 | |||