Table 1 1H and 13C NMR data for the phthalide nucleus of 1–8 (CDCl3, δ in ppm, J in Hz)*
From: Novel phthalide derivatives identified from Ligusticum chuanxiong (Chuanxiong)
Position | 1/3/5 | 2/4/6 | 7 | 8 | ||||
|---|---|---|---|---|---|---|---|---|
δ C | δ H | δ C | δ H | δ C | δ H | δ C | δ H | |
1 | 167.7 | 168.9 | 169.6 | 169.4 | ||||
3 | 148.2 | 148.3 | 148.3 | 148.1 | ||||
3a | 155.2 | 152.9 | 153.7 | 153.3 | ||||
4 | 17.8 | 2.48 (dt, 18.5, 5.4) 2.62 (dt, 18.5, 6.9) | 18.3 | 2.51 | 18.9 | 2.41 2.63 (dt, 18.5, 5.8) | 19.1 | 2.51 |
5 | 25.8 | 1.99 | 23.1 | 2.00 2.10 | 25.5 | 1.82 2.08 | 26.5 | 1.88 2.06 |
6 | 68.5 | 4.08 (dt, 6.0, 3.9) | 72.3 | 5.10 | 67.9 | 4.00 | 71.7 | 3.93 |
7 | 67.5 | 5.53 (d, 3.9) | 63.4 | 4.56 (d, 3.9) | 63.0 | 4.59 (d, 3.0) | 67.6 | 4.44 (d, 5.5) |
7a | 122.3 | 125.6 | 125.7 | 125.9 | ||||
8 | 114.3 | 5.31 (t, 7.9) | 114.5 | 5.31 (t, 7.9) | 114.7 | 5.30 (t, 7.9) | 114.6 | 5.28 (t, 7.9) |
9 | 28.2 | 2.36 | 28.3 | 2.37 | 28.2 | 2.34 | 28.2 | 2.33 |
10 | 22.4 | 1.50 | 22.4 | 1.51 | 22.4 | 1.49 | 22.4 | 1.47 |
11 | 13.9 | 0.95 (t, 7.4) | 13.9 | 0.96 (t, 7.4) | 13.9 | 0.94 (t, 7.4) | 13.9 | 0.93 (t, 7.3) |