Table 2. 1H and 13C NMR sectral data of compounds 1 and 21)
Position | Oolonghomobisflavan A (1) | Oolonghomobisflavan B (2) |
δH | δC | δH-Upper | δC-Upper | δH-Lower | δC-Lower |
2 | 5.20 (br s) | 79.5 | 4.99 (br s) | 77.8 | 5.29 (br s) | 79.6 |
3 | 5.52 (m) | 69.3 | 5.48 (m) | 68.9 | 5.57 (m) | 69.3 |
4 | 3.07 (m), 2.98 (m) | 26.9 | 3.05 (m), 2.88 (m) | 26.5 | 3.08 (m), 2.97 (m) | 26.9 |
5 | - | 152.6 | - | 154.1 | - | 152.5 |
6 | 6.10 (s) | 97.4 | - | 105.8 | 6.15 (s) | 97.1 |
7 | - | 155.6 | - | 154.3 | - | 154.3 |
8 | - | 105.5 | 6.12 (s) | 96.2 | - | 107.2 |
9 | - | 155.8 | - | 155.5 | - | 154.9 |
10 | - | 99.3 | - | 99.7 | - | 100.2 |
1' | - | 129.7 | - | 129.3 | - | 130.5 |
2' | 6.77 (s) | 106.8 | 6.60 (s) | 106.6 | 6.77 (s) | 106.5 |
3' | - | 145.9 | - | 146.2 | - | 146.0 |
4' | - | 133.5 | - | 132.8 | - | 133.4 |
5' | - | 145.9 | - | 146.2 | - | 146.0 |
6' | 6.77 (s) | 106.8 | 6.60 (s) | 106.6 | 6.77 (s) | 106.5 |
1'' | - | 121.5 | - | 121.4 | - | 121.5 |
2'' | 7.11 (s) | 110.3 | 6.99 (s) | 109.7 | 7.08 (s) | 109.9 |
3'' | - | 146.4 | - | 145.6 | - | 145.7 |
4'' | - | 139.0 | - | 138.6 | - | 138.5 |
5'' | - | 146.4 | - | 145.6 | - | 145.7 |
6'' | 7.11 (s) | 110.3 | 6.99 (s) | 109.7 | 7.08 (s) | 109.9 |
7'' | | 166.5 | - | 166.0 | - | 166.1 |
-CH2- | 3.98 (s) | 16.3 | 3.87 (s) | 17.0 | | |
1H NMR spectra were measured at 600 MHz, and 13C NMR spectra were measured at 150 MHz, Data obtained in acetone-d6+D2O. Assignments based on HSQC and HMBC spectra data.