Table 5.
Comparison of 1H-NMR data between compound 4 and Ref. in methanol-d 4 (800 MHz, δ in ppm, J in Hz)
| Position | 4 | Ref.*1 | ||
|---|---|---|---|---|
| δ | δ | |||
| 2 | 3.84 | (1H, ddd, J = 4.0, 10.4, 11.2) | 3.85 | (1H, ddd, J = 4.4, 9.9, 11.0) |
| 3 | 4.64 | (1H, d, J = 10.4) | 4.64 | (1H, d, J = 9.9) |
| 12 | 5.29 | (1H, t, J = 3.0) | 5.30 | (1H, br s) |
| 18 | 2.51 | (1H, s) | 2.51 | (1H, br s) |
| 23 | 0.90 | (3H, s) | 0.90 | (3H, s) |
| 24 | 0.95 | (3H, s) | 0.96 | (3H, s) |
| 25 | 1.05 | (3H, s) | 1.06 | (3H, s) |
| 26 | 0.82 | (3H, s) | 0.81 | (3H, s) |
| 27 | 1.36 | (3H, s) | 1.97*2 | (3H, s) |
| 29 | 1.20 | (3H, s) | 1.20 | (3H, s) |
| 30 | 0.93 | (3H, d, J = 6.4) | 0.93 | (3H, d, J = 6.6) |
| 2′ | 6.43 | (1H, d, J = 16.0) | 6.43 | (1H, d, J = 16) |
| 3′ | 7.62 | (1H, d, J = 16.0) | 7.63 | (1H, d, J = 16) |
| 2′’ | 7.20 | (1H, d, J = 1.6) | 7.21 | (1H, br s) |
| 5′’ | 6.81 | (1H, d, J = 8.0) | 6.81 | (1H, d, J = 7.7) |
| 6′’ | 7.07 | (1H, dd, J = 1.6, 8.0) | 7.08 | (1H, br d, J = 7.7) |
| OCH3 | 3.89 | (3H, s) | 3.90 | (3H, s) |
Data taken from reference 30
*1 Zhao Q-C, Cui C-B, Cai B, Yao X-S, Osada H, Molbank, M328 (2003)
*2 May be mistyped