Official Journal of the Japan Wood Research Society
Table 3 1H NMR spectral data of compounds 5– 8 (δ, mult, J in Hz)
From: Antioxidative catechol lignans/neolignans isolated from defatted kernel of Jatropha curcas
Proton | 5 | 6 | 7 | 8 |
|---|---|---|---|---|
2 | 6.84 (d, 2.1) | 6.86 (d, 2.1) | 6.80 (d, 2.1) | 6.80 (d, 1.7) |
5 | 6.80 (d, 7.9) | 6.81 (d, 7.9) | 6.73 (d, 7.9) | 6.74 (d, 8.2) |
6 | 6.76 (dd, 7.9, 2.0) | 6.78 (dd, 8.1, 1.9) | 6.68 (dd, 8.2, 2.1) | 6.69 (dd, 8.1, 1.9) |
7 | 4.81 (d, 7.9) | 4.80 (d, 7.6) | 4.62 (d, 3.8) | 4.64 (d, 4.5) |
8 | 3.99 (ddd, 7.6, 4.6, 2.9) | 4.08 (ddd, 7.8, 4.7, 2.8) | 3.08 (m) | 3.10 (m) |
9a | 3.67 (dd, 12.2, 2.6) | 3.71 (12.5, 2.6) | 4.21 (m) | 4.22 (m) |
9b | 3.48 (dd, 12.2, 4.7) | 3.49 (12.4, 4.5) | 3.81 (m) | 3.83 (m) |
2′ | 7.04 (d, 2.0) | 7.26 (d, 2.1) | 6.92 (m) | 6.98 (m) |
5′ | 6.83 (d, 8.3) | 7.03 (d, 8.2) | 6.93 (d, 8.2) | 6.86 (m) |
6′ | 6.92 (dd, 8.3, 2.1) | 7.24 (dd, 8.2, 2.1) | 6.87 (dd, 8.4, 1.9) | 6.86 (m) |
7′ | 6.53 (d, 15.8) | 7.58 (d, 15.8) | 4.69 (d, 4.1) | 4.71 (d, 4.1) |
8′ | 6.16 (dt, 15.8, 6.2) | 6.64 (dt,15.8, 7.9) | 3.08 (m) | 3.10 (m) |
9′a | 4.06 (dd, 6.2, 1.3) | 4.21 (m) | 4.22 (m) | |
9′b | 4.06 (dd, 6.2, 1.3) | 3.81 (m) | 3.83 (m) | |
2″ | 6.85 (d, 2.1) | 6.84 (d, 1.7) | ||
5″ | 6.80 (d, 7.9) | 6.80 (d, 7.9) | ||
6″ | 6.76 (dd, 8.1, 1.9) | 6.75 (dd, 8.2, 2.1) | ||
7″ | 4.80 (d, 8.2) | 4.79 (d, 7.9) | ||
8″ | 3.98 (ddd, 7.9, 4.8, 2.7) | 3.99 (ddd, 7.7, 4.8, 2.7) | ||
9″a | 3.66 (dd, 12.4, 2.7) | 3.67 (dd, 12.4, 2.7) | ||
9″b | 3.47 (dd, 12.2, 4.6) | 3.48 (dd, 12.2, 4.6) | ||
OMe | 3.36 (s) | |||
CHO | 9.59 (d, 7.6) |