Comparison of 1H and 13C NMR spectroscopic data of dehydroguaiaretic acid (9)23,54 and cinnamophilin A (10)53.
| |||
|---|---|---|---|
| Position | Dehydroguaiaretic acid (9) | Cinnamophilin A (10) | |
| δ C | δ H (multi., J in Hz) | δ H (multi., J in Hz) | |
| 1 | 138.0 | — | — |
| 2 | 133.4 | — | — |
| 3 | 132.6 | — | — |
| 4 | 126.7 | 7.50 (s) | 7.49 (s) |
| 4a | 129.0 | — | — |
| 5 | 115.2 | 7.06 (s) | 7.05 (s) |
| 6 | 147.5 | — | — |
| 7 | 145.6 | — | — |
| 8 | 109.5 | 6.82 (s) | 6.81 (s) |
| 8a | 128.3 | — | — |
| 9 | 18.3 | 2.13 (s) | 2.11 (s) |
| 10 | 21.9 | 2.45 (s) | 2.45 (s) |
| 1′ | 134.1 | — | — |
| 2′ | 123.9 | 6.72 (d, 2.0) | 6.73 (d, 1.6) |
| 3′ | 147.3 | — | — |
| 4′ | 145.3 | — | — |
| 5′ | 105.9 | 7.03 (d, 8.4) | 7.02 (d, 8.0) |
| 6′ | 113.5 | 6.74 (dd, 8.4, 2.0) | 6.72 (dd, 8.0, 1.6) |
| OCH3-6 | 56.7 | 4.00 (s) | 4.00 (s) |
| OCH3-3′ | 56.8 | 3.86 (s) | 3.85 (s) |