Table 1.
1H- and 13C-NMR spectroscopic data of compound 1 (δ in ppm, methanol-d4, 500 MHz, and 125 MHz).
| Position a | 1 | |
|---|---|---|
| δC | δ H b | |
| 1 | ||
| 2 | 125.5 | 7.27 s |
| 3 | 112.7 | |
| 4 | 120.0 | 7.52 d (8.0) |
| 5 | 121.1 | 6.92 ddd (8.0, 7.0, 1.0) |
| 6 | 123.2 | 7.10 ddd (8.0, 7.0, 1.0) |
| 7 | 111.8 | 7.47 d (7.0) |
| 8 | 130.4 | |
| 9 | 138.5 | |
| 10 | 28.3 | 3.34 overlapped/3.49 overlapped |
| 11 | 55.6 | 4.78 t (5.0) |
| 12 | 175.9 | |
| 13 | ||
| Glc-1′ | 86.8 | 5.41 d (9.0) |
| Glc-2′ | 73.8 | 3.92 t (9.0) |
| Glc-3′ | 79.1 | 3.60 t (9.0) |
| Glc-4′ | 71.6 | 3.49 overlapped |
| Glc-5′ | 80.7 | 3.55 ddd (10.0, 6.0, 2.5) |
| Glc-6′ | 62.9 | 3.67 dd (12.0, 6.0)/3.86 dd (12.0, 2.0) |
| 1″ | 135.6 | |
| 2″/6″ | 129.7 | 7.67 dd (8.5, 1.5) |
| 3″/5″ | 128.6 | 7.38 dd (8.5, 7.5) |
| 4″ | 132.9 | 7.46 tt (7.5, 1.5) |
| 7″ | 170.4 | |
a All assignments were based on COSY, HSQC, and HMBC results. b δH Multi (J in Hz).