Table 1.
1H and 13C NMR Data of 1–4 in CDCl3 (δ in ppm, J in Hz)
| Position | 1 a | 2 b | 3 b | 4 a | ||||
|---|---|---|---|---|---|---|---|---|
| δ H | δc | δ H | δ c | δ H | δ c | δ H | δ c | |
| 1 | 194.9 | 195.2 | 198.5 | 197.7 | ||||
| 2 | 2.44, 2.33 (m) | 35.0 | 4.10 (dd, 5.6) | 71.9 | 4.07 (dd, 5.6) | 71.4 | 4.15 (dd, 5.2) | 71.0 |
| 3 | 2.31, 2.03 (m) | 31.3 | 2.42, 1.89 (m) | 30.7 | 2.36, 1.79 (m) | 29.4 | 2.37, 1.78 (m) | 29.2 |
| 4 | 4.57 (q, 6.4) | 64.1 | 2.56 (m) | 23.4 | 2.61, 2.48 (m) | 27.6 | 2.64, 2.47 (m) | 27.3 |
| 5 | 175.0 | 178.3 | 171.6 | 173.1 | ||||
| 6 | 113.4 | 110.8 | 109.6 | 110.5 | ||||
| 7 | 3.06, 2.44 (m) | 32.5 | 3.09, 2.56 (m) | 32.2 | 2.61, 2.09 (m) | 18.1 | 4.39 (m) | 65.4 |
| 8 | 5.28 (m) | 82.2 | 5.28 (m) | 87.9 | 1.95, 1.59 (m) | 23.1 | 2.04, 1.63 (m) | 28.1 |
| 9 | 2.97, 2.72 (m) | 48.8 | 5.59 (m) | 128.5 | 3.76 (m) | 81.2 | 4.13 (m) | 77.0 |
| 10 | 207.9 | 5.82 (m) | 135.9 | 3.69 (m) | 73.5 | 3.65 (m) | 72.9 | |
| 11 | 2.44 (m) | 44.1 | 2.10 (m) | 32.5 | 1.62 (m) | 33.1 | 1.64 (m) | 33.2 |
| 12 | 1.56 (m) | 23.9 | 1.54 (m) | 25.2 | 1.46 (m) | 26.0 | 1.30 (m) | 22.6 |
| 13 | 1.28 (m) | 31.9 | 1.51 (m) | 36.7 | 1.62 (m) | 25.8 | 1.30 (m) | 29.3 |
| 14 | 1.28 (m) | 29.2 | 3.56 (m) | 73.5 | 1.46 (m) | 39.5 | 1.30 (m) | 31.7 |
| 15 | 1.28 (m) | 22.8 | 1.50 (m) | 30.4 | 3.82 (m) | 68.4 | 1.30 (m) | 22.6 |
| 16 | 0.88 (t, 6.0) | 14.4 | 0.94 (t, 7.6) | 10.2 | 1.20 (d, 6.4) | 24.0 | 0.90 (t, 6.5) | 14.0 |
| OCH3 | 3.38 (s) | 56.9 | ||||||
a 1H NMR was recorded at 400 MHz, and 13C NMR was recorded at 100 MHz
b 1H NMR was recorded at 500 MHz, and 13C NMR was recorded at 125 MHz