Table 1 1H (500 MHz) and 13C (125 MHz) NMR spectral data of compounds 1 and 2
Position | 1a | 2b | ||
|---|---|---|---|---|
δC | δH | δC | δH | |
1 | 172.75 | 172.08 | ||
2 | 38.94 | 3.50 | 38.77 | 3.33 |
3 | 135.79 | 135.80 | ||
4 | 119.83 | 122.53 | ||
5 | 158.30 | 156.88 | ||
6 | 101.42 | 6.29, d (4) | 100.86 | 6.49, br s |
7 | 159.95 | 159.59 | ||
8 | 110.43 | 6.25, d (4) | 112.28 | 6.37, br s |
9 | 211.28 | 209.76 | ||
10 | 47.23 | 3.40, m | 47.44 | 3.25 |
11 | 25.94 | 1.35, m 1.75, m | 25.75 | 1.24, m 1.65, m |
12 | 10.91 | 0.90, t | 11.90 | 0.82, t |
13 | 14.87 | 1.08, d (8.5) | 15.76 | 0.98, d (6.5) |
14-OCH3 | 51.02 | 3.68, s | ||
Glu-1 | 100.25 | 4.93, d (7.5) | ||
Glu-2 | 77.54 | 3.31 | ||
Glu-3 | 77.45 | 3.31 | ||
Glu-4 | 69.94 | 3.16 | ||
Glu-5 | 73.82 | 3.19 | ||
Glu-6 | 61.00 | 3.70 3.49 | ||