Table 1. NMR spectroscopic data for compounds 1 and 2 (pyridine-d5).
Position | 1 |
2 |
||
---|---|---|---|---|
δC | δH (J in Hz) | δC | δH (J in Hz) | |
1 | 77.8 | 4.57, brs | 77.8 | 4.58, m |
2 | 74.4 | 4.41, m | 74.0 | 4.41, m |
3 | 72.8 | 5.03, brs | 72.8 | 5.03, brs |
4 | 68.7 | 4.31, brs | 68.7 | 4.31, brs |
5 | 78.2 | 78.2 | ||
6 | 30.5 | 2.48, d (13.2) | 30.5 | 2.48, d (13.2) |
1.67, m | 1.67, m | |||
7 | 28.8 | 1.54, m | 28.8 | 1.50, m |
1.14, m | 1.10, m | |||
8 | 35.2 | 1.71, m | 35.2 | 1.71, m |
9 | 45.7 | 1.22, m | 45.7 | 1.20, m |
10 | 45.5 | 45.5 | ||
11 | 21.9 | 1.58, m | 21.9 | 1.57, m |
1.45, m | 1.41, m | |||
12 | 40.2 | 1.59, m | 40.2 | 1.58, m |
1.03, m | 1.01, m | |||
13 | 40.9 | 40.9 | ||
14 | 56.4 | 1.03, m | 56.4 | 1.01, m |
15 | 32.5 | 2.03, m | 32.5 | 2.02, m |
1.44, m | 1.43, m | |||
16 | 81.7 | 4.59, m | 81.8 | 4.58, m |
17 | 63.3 | 1.81, m | 63.4 | 1.80, m |
18 | 16.8 | 0.84, s | 16.8 | 0.83, s |
19 | 13.9 | 1.59, s | 13.9 | 1.58, s |
20 | 42.2 | 1.96, m | 42.2 | 1.95, m |
21 | 15.3 | 1.09, d (7.0) | 15.3 | 1.09, d (7.0) |
22 | 109.8 | 109.8 | ||
23 | 33.5 | 1.81, m | 33.5 | 1.76–1.79, m |
24 | 29.3 | 2.70, m | 29.3 | 2.70, m |
2.25, d (11.5) | 2.24, d (11.5) | |||
25 | 144.7 | 144.7 | ||
26 | 65.4 | 4.47, d (12.1) | 65.4 | 4.47, d (12.1) |
4.04, d (12.1) | 4.04, d (12.1) | |||
27 | 109.1 | 4.82, s | 109.1 | 4.81, s |
4.78, s | 4.78, s | |||
2-O-Xyl | 2-O-Ara | |||
1 | 103.5 | 5.15, d (7.5) | 103.4 | 5.13, d (7.0) |
2 | 75.4 | 4.08, m | 72.8 | 4.56, m |
3 | 78.7 | 4.18, m | 74.8 | 4.22, m |
4 | 71.4 | 4.24, m | 69.7 | 4.36, m |
5 | 67.7 | 4.40, m | 67.3 | 4.38, m |
3.76, m | 3.85, m |