Research Article
Uncommon Trimethoxylated Flavonol Obtained from Rubus rosaefolius Leaves and Its Antiproliferative Activity
Table 1
1H and 13C NMR data of compound 1 in DMSO-d6.
| Position | 1H NMR | 13C NMR | HMBC |
| 2 | | 146.3 | | 3 | | 135.8 | | 4 | | 176.4 | | 5 | | 147.3 | | 6 | | 131.0 | | 7 | | 150.6 | | 8 | | 127.7 | | 9 | | 144.5 | | 10 | | 102.4 | | 1′ | | 123.4 | | 2′, 6′ | 8.24 d (9.0) | 129.2 | C-2, C-2′6′, C-4′ | 3′, 5′ | 7.17 d (9.0) | 114.2 | C-1′, C-3′5′, C4′ | 4′ | | 160.5 | | OMe-4′ | 3.80 s | 55.4 | C-4′ | OMe-6 | 3.79 s | 60.2 | C-6 | OMe-8 | 3.85 s | 61.1 | C-8 | OH-3 | 9.56 s | | | OH-5 | 10.38 s | | | OH-7 | 12.26 s | | C-6, C-9, C-10 |
|
|
in PPM; in Hz; 1H NMR at 300 MHz and 13C NMR at 75 MHz.
|