Table 1 NMR Data for Compounds 1, 3–5 (DMSO-d6, 500 MHz)
From: Flavones from Erythrina falcata are modulators of fear memory
Position | 1 | 3 | 4 | 5 | ||||
|---|---|---|---|---|---|---|---|---|
|  | 1H NMR (δH) | 13C NMR (δC) | 1H NMR (δH) | 13C NMR (δC) | 1H NMR (δH) | 13C NMR (δC) | 1H NMR (δH) | 13C NMR (δC) |
2 | ----------- | 163.9 | ----------- | ----------- | ----------- | 163.3 | ----------- | 163.3 |
3 | 6.78 [1H, s] | 102.5 | 6.77 [1H, s] | ----------- | 6.75 [1H, s] | 103.8 | 6.86 [1H, s] | 103.1 |
4 | ----------- | 182.2 | ----------- | ----------- | ----------- | 182.4 | ----------- | 181.7 |
5 | ----------- | 161.2 | 13.16 [OH, s] | ----------- | 13.54 [OH, s] | 161.0 | 8.37 [OH, s] | 161.5 |
6 | ----------- | 107.6 | 6.26 [1H, s] | ----------- | ----------- | 109.2 | ----------- | ----------- |
7 | ----------- | 161.3 | ----------- | ----------- | ----------- | 163.9 | ----------- | 163.6 |
8 | ----------- | 105.3 | ----------- | ----------- | 6.49 [1H, s] | 94.32 | 6.51 [1H, s] | 93.4 |
9 | ----------- | 155.1 | ----------- | ----------- | ----------- | ----------- | ----------- | ----------- |
1′ | ----------- | 121.5 | ----------- | ----------- | ----------- | 121.4 | ----------- | 123.0 |
2′ , 6′ | 8.02 [2H, d, (6.5)] | 129,0 | 8.03 [2H, d,(10.0)] | ----------- | 7.91 [2H, d, (8.5)] | 128.9 | 7.55 [2H, d, (8.0)] | 109.8 |
3′ , 5′ | 6.91 [2H, d, (8.5)] | 115.9 | 6.89 [2H, d, (10.0)] | ----------- | 6.92 [2H, d, (9.0)] | 116.5 | 6.94 [2H, d, (8.0)] | 115.4 |
4′ | ----------- | 161.3 | ----------- | ----------- | ----------- | 161.2 | 3.89 [OCH3] | 55.6 |
1″ | 4.71 [1H, d, (9)] | 73.4 | 4.69 [1H, d, (9.5)] | ----------- | 4.59 [1H, d, (10.0)] | 73.6 | 4.60 [1H, d, (9.5)] | 72.9 |
2″ | 3.38 - 3.80 | 71.0 | 3.83 – 3.52 | ----------- | 3.13 -3.89 | 71.1 | 3.15- 3.89 | 69.2 |
3″ | 3.38 - 3.80 | 78.8 | 3.83 – 3.52 | ----------- | 3.13 -3.89 | 61.9 | 3.15- 3.89 | 61 |
4″ | 3.38 - 3.80 | 69.1 | 3.83 – 3.52 | ----------- | 3.13 -3.89 | 56.6 | 3.15- 3.89 | 55.4 |
5″ | 3.38 - 3.80 | 80.9 | 3.83 – 3.52 | ----------- | 3.13 -3.89 | 81.3 | 3.15- 3.89 | 60.8 |
6″ | 3.38 - 3.80 | 59.8 | 3.83 – 3.52 | ----------- | 3.13 -3.89 | 82.0 | 3.15- 3.89 | 69.8 |
1‴ | 4.78 [1H, d, (9.5)] | 74.2 | ----------- | ----------- | ----------- | ----------- | ----------- | ----------- |
2‴ | 3.38 - 3.80 | 71.9 | ----------- | ----------- | ----------- | ----------- | ----------- | ----------- |
3‴ | 3.38 - 3.80 | 77.9 | ----------- | ----------- | ----------- | ----------- | ----------- | ----------- |
4‴ | 3.38 - 3.80 | 70.6 | ----------- | ----------- | ----------- | ----------- | ----------- | ----------- |
5‴ | 3.38 - 3.80 | 81.9 | ----------- | ----------- | ----------- | ----------- | ----------- | ----------- |
6‴ | 3.38 - 3.80 | 61.3 | ----------- | ----------- | ----------- | ----------- | ----------- | ----------- |