Table 2. 1H-NMR Data for compounds 1–7 (δ in ppm, J in Hz, 1, 4 in acetone-d6, 2 in DMSO-d6, 3 in CDCl3, 5–7 in CD3OH).
| Position | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|
| 1 | – | – | – | – | – | – | |
| 2 | 7.22(d,8.4) | 7.11(d,7.8) | 7.46∼7.51(m) | 7.26(d,8.4) | 7.44(d,8.4) | 6.84(s) | 7.43(s) |
| 3 | 6.89(d,8.4) | 6.77(d,8.4) | 7.46∼7.51(m) | 6.87(d,8.4) | 6.85(m) | – | – |
| 3-OH | – | – | – | – | – | – | – |
| 4 | – | – | 7.40(m) | – | – | – | – |
| 4-OH | – | 9.31(s) | – | – | – | – | – |
| 5 | 6.89(d,8.4) | 6.77(d,8.4) | 7.46∼7.51(m) | 6.87(d,8.4) | 6.85(m) | 6.81(d,6.6) | 7.01(s) |
| 6 | 7.22(d,8.4) | 7.11(d,7.8) | 7.46∼7.51(m) | 7.26(d,8.4) | 7.44(d,8.4) | 7.12(s) | – |
| 1′ | – | – | – | – | – | – | – |
| 2′ | – | – | – | – | – | – | – |
| 2′-OH | 8.51(s) | 5.97(s) | – | – | – | – | |
| 2′-OMe | 3.58(s) | – | – | – | – | – | – |
| 3′ | – | – | – | – | – | – | – |
| 3′-OMe | 3.57(s) | 3.31(s) | 3.47(s) | 3.37(s) | 3.37(s) | 3.42(s) | 3.76(s) |
| 4′ | – | – | – | – | – | – | – |
| 5′ | 6.77(s) | 6.40(s) | 6.52(s) | 6.52(s) | 6.41(s) | 6.43(s) | 6.60(s) |
| 6′ | – | – | – | – | – | – | – |
| 6′-OMe | 3.73(s) | 3.64(s) | 3.76(s) | 3.72(s) | 3.63(s) | 3.67(s) | 3.92(s) |
| 1″ | – | – | – | – | – | – | – |
| 2″ | 7.61(d, 7.3) | 7.44(d,7.8) | 7.68(m) | 7.65(d,7.8) | 6.85(m) | 6.84(s) | 7.38(d,8.4) |
| 3″ | 7.45(t, 7.7) | 6.85(d,7.8) | 7.46∼7.51(m) | 7.45(t,7.8) | – | – | 6.85(d,9.0) |
| 3″-OH | – | – | – | – | – | – | – |
| 4″ | 7.36(t, 7.4) | – | 7.40(m) | 7.37(m) | – | – | – |
| 4″-OH | – | 9.52(s) | – | – | – | – | – |
| 5″ | 7.45(t, 7.7) | 6.85(d,7.8) | 7.46∼7.51(m) | 7.45(t,7.8) | 6.71(dd,8.4,2.4) | 6.72(d,5.4) | 6.85(d,9.0) |
| 6″ | 7.61(d, 7.3) | 7.44(d,7.8) | 7.68(m) | 7.65(d,7.8) | 6.81(m) | 6.96(d,5.4) | 7.38(d,8.4) |