Table 1.
NMR data for compound 10. a
| Position | δ H | δ C | Position | δ H | δ C |
|---|---|---|---|---|---|
| 1 | 119.1 | OCH2O | 6.46 s | 103.0 | |
| 2 | 7.65 s | 105.7 | OCH3 | 3.94 s | 56.0 |
| 3 | 148.2 | 1′ | 5.08 d (6.5) | 103.0 | |
| 4 | 146.9 | 2′ | 3.92 dd (8.5, 6.5) | 81.0 | |
| 4a | 109.0 | 3′ | 3.54 t (8.5) | 75.8 | |
| 4b | 127.9 | 4′ | 3.47 t (8.5) | 69.4 | |
| 5 | 8.26 dd (8.5, 1.0) | 118.4 | 5′ | 3.18 m | 76.9 |
| 6 | 7.56 dd (8.0, 8.5) | 126.1 | 6′α, 6′β | 3.8 − 3.6 m | 60.5 |
| 7 | 7.23 dd (8.0, 1.0) | 110.8 | 1″ | 4.65 d (7.5) | 102.4 |
| 8 | 157.2 | 2″ | 3.06 dd (7.5, 8.5) | 74.1 | |
| 8a | 120.0 | 3″ | 3.10 t (8.5) | 76.1 | |
| 9 | 132.6 | 4″ | 3.17 t (8.5) | 69.3 | |
| 10 | b | 5″ | 2.99 ddd (8.5, 4.7, 2.5) | 76.4 | |
| 10a | 124.4 | 6″α, 6″β | 3.35 m | 60.3 | |
| 3.8 − 3.6 m | |||||
| CO | 167.4 | NH | 10.18 s |
a The 1H- and 13C-NMR data were assigned with the assistance of gHMQC, gHMBC, and 1H-1H COSY experiments (11.7 T); recorded in DMSO-d6; J in Hz; b Signal not observed.