Table 1.
NMR Spectroscopic data of compound 1 (500 MHz in CDCl3).
| position | δC | δH (J in Hz) | COSY (1H–1H) | HMBC (1H →13C) |
|---|---|---|---|---|
| 1 | 153.2 | - | - | - |
| 2 | 114.3 | - | - | - |
| 3 | 156.3 | - | - | - |
| 4 | 101.2 | 6.30 (s) | - | C-1, C-2, C-3, C-4a, C-11b |
| 4a | 154.0 | - | - | - |
| 6 | 65.0 | 5.44 (s) | - | C-4a, C-6a, C-6b, C-11a |
| 6a | 107.3 | - | - | - |
| 6b | 118.7 | - | - | - |
| 7 | 116.1 | 6.80 (d, 8.2) | H-8 | C-6b, C-8, C-9 |
| 8 | 112.8 | 7.09 (d, 8.2) | H-7 | C-6a, C-6b, C-9, C-10, C-10a |
| 9 | 152.1 | - | - | - |
| 10 | 110.0 | - | - | - |
| 10a | 154.7 | - | - | - |
| 11a | 145.9 | - | - | - |
| 11b | 104.7 | - | - | - |
| 1′ | 22.5 | 3.42 (d, 7.2) | H-2′, H-4′, H-5′ | C-1, C-2, C-3, C-1′, C-2′, C-3′ |
| 2′ | 122.2 | 5.25 (t, 7.2) | H-1′, H-4′, H-5′ | - |
| 3′ | 135.2 | - | - | - |
| 4′ | 18.0 | 1.84 (s) | H-1′, H-2′ | C-2′, C-3′, C-5′ |
| 5′ | 25.9 | 1.76 (s) | H-1′, H-2′ | C-2′, C-3′ |
| 1″ | 23.4 | 3.73 (d, 7.1) | H-2″, H-4″, H-5″ | C-9, C-10, C-10a, C-2″, C-3″ |
| 2″ | 121.2 | 5.41 (t, 7.1) | H-1″, H-4″, H-5″ | - |
| 3″ | 135.7 | - | - | - |
| 4″ | 18.0 | 1.87 (s) | H-1″, H-2″ | C-2″, C-3″, C-5″ |
| 5″ | 25.9 | 1.77 (s) | H-1″, H-2″ | C-2″, C-4″ |
| OMe-1 | 62.5 | 3.89 (s) | - | C-1 |
| OH-3 | 5.46 (s) | C-2, C-3, C-4 | ||
| OH-9 | 5.32 (s) | C-8, C-9, C-10 |