Table 3 1H NMR (300 MHz) and/or 13C NMR (75 MHz) data for compounds 1, 2, 3, 4 in CDCl3[δ(ppm), J(Hz)]
From: Anti-leukemia activity of semi-synthetic phenolic derivatives from Polygonum limbatum Meisn.
1 | 2 | 3 | 4 | ||||
|---|---|---|---|---|---|---|---|
Position | δ H | δ C | δ H | δ C | δ H | δ C | δ H |
1 | - | - | - | - | - | 138.3 | - |
2 | 4.46(dd,6.54,12.86) | 65.7 | 4.46(dd,6.54,12.86) | 65.8 | 7.41(m) | 127.4 | 7.41(m) |
3 | 2.78(dd,6.55,12.87) | 36.4 | 2.68(dd,5.13,14.07) | 38.1 | 7.45(m) | 128.2 | 7.45(m) |
4 | - | 196.1 | - | 188.7 | 7.43(m) | 128.7 | 7.43(m) |
4a | - | 103.3 | - | 107.7 | - | ||
5 | - | - | - | 155.1 | 7.45(m) | 128.5 | 7.45(m) |
5-OH | 11.91(s) | 155.1 | - | - | - | ||
6 | - | 128.9 | - | 128.9 | 7.42(m) | 127.4 | 7.42(m) |
6-OCH3 | 3.83(s) | 60.6 | 377(s) | 61.1 | - | - | - |
7 | - | 160.1 | - | 159.5 | - | - | - |
8 | 6.08(s) | 92.2 | 6.38(s) | 99.1 | - | - | - |
8a | - | 158.6 | - | 158.5 | - | - | - |
1′ | 4.61(d,6.63) | 66.6 | 4.61(d,6.63) | 66.9 | - | 107.2 | - |
2′ | 5.48(brs) | 118.7 | 5.50(brs) | 118.3 | - | 158.2 | - |
2′-OH | - | - | - | 13.93 | - | - | |
3′ | - | 138.6 | - | 139.0 | - | 130.0 | - |
3′-OCH3 | - | - | - | 3.85 | 55.8 | 3.79(s) | |
4′ | 1.81(s) | 25.6 | 1.83(s) | 25.6 | - | 157.9 | - |
5′ | 1.76(s) | 18.1 | 1.77(s) | 18.2 | 6.04 | 88.5 | 6.41(s) |
6′ | - | - | - | - | - | 159.4 | - |
6′-OCH3 | - | - | - | - | 3.93 | 60.5 | 3.79(s) |
1″ | - | - | - | 169.3 | 4.71(d,6.57) | 65.8 | 4.65(d,6.52) |
2″ | - | - | 2.10(s) | 20.8 | 5.52(brs) | 119.2 | 5.52(brs) |
3″ | - | - | - | - | - | 138.3 | - |
4″ | - | - | - | - | 1.83(s) | 25.7 | 1.82(s) |
5″ | - | - | - | - | 1.62(s) | 18.2 | 1.78(s) |
α | - | - | - | - | 7.81(d,15.65) | 127.4 | 7.01(d,16.06) |
β | - | - | - | - | 7.90(d, 15.65) | 142.4 | 7.53(d,8.49) |
C=O | - | - | - | - | 13.93(s) | 193.0 | |