Table 3.
NMR Spectroscopic Data (500 MHz, CDCl3) for compound 1.
| Position | Proton δ ppm (mult, J Hz) | Carbon δppm (mult) | COSY (NOESY) | HMBC | ||
|---|---|---|---|---|---|---|
| 2 | 5.37 (1H, dd, 5.8, 1.0) | 78.7 (CH) | H-3 | C-1′, C-2′, C-6′ | ||
| 3 | 2.85 (1H, dd, 17.1, 3.1) 3.10 (1H, dd, 17.2, 12.9) | 43.5 (CH2) | H-2, H-3 | C-2, C-4 | ||
| 4 | – | 196.0 (C) | – | – | ||
| 5 | – | 163.4 (C) | – | – | ||
| 6 | – | 111.7 (C) | – | – | ||
| 7 | – | 164.6 (C) | – | – | ||
| 8 | 5.99 (1H, s) | 96.8 (CH) | – | C-6, C-7, C-9, C-10 | ||
| 9 | – | 160.8 (C) | – | – | ||
| 10 | – | 103.1 (C) | – | – | ||
| 1′ | – | 138.5 (C) | – | – | ||
| 2′ | 7.46 (1H, d, 1.1) | 126.1 (CH) | H-3′ | C-2, C-4′, C-6′ | ||
| 3′ | 7.45 (1H, m) | 128.8 (CH) | H-2′ | C-1′ | ||
| 4′ | 7.42 (1H, m) | 128.8 (CH) | C-2′, C-6′ | |||
| 5′ | 7.45 (1H, m) | 128.8 (CH) | C-1′ | |||
| 6′ | 7.47 (1H, d, 2.7) | 126.1 (CH) | C-2, C-2′, C-4′ | |||
| 1″ | – | 40.7 (C) | – | |||
| 2″ | 6.47 (1H, dd, 17.8, 10.5) | 149.7 (CH) | H-3″ | C-1″, C-4″, C-5″ | ||
| 3″ | 5.39 (1H, d, 1.1) 5.48 (1H, dd, 17.8, 0.9) | 113.4 (CH2) | H-2″ | C-1″, C-2″ | ||
| 4″ | 1.62 (s) | 27.3 (CH3) | – | C-1″, C-2″, C-6 | ||
| 5″ | 1.60 (s) | 26.6 (CH3) | – | C-1″, C-2″, C-6 | ||
| 5-OH | 13.13 (s) | – | – | C-5, C-6, C-10 | ||
| 7-OH | 7.50 (s) | – | – | C-6, C-7, C-8 | ||