Table 2.
Kromeic acid (KRA) 1H -NMR and 13C- NMR data.
| Position * | δC | Position * | δH, m, ( J in Hz) |
|---|---|---|---|
| 21 | 130.7 | ||
| 1 | 123.0 | 22 | 5.90, s |
| 2 | 74.5 | 23 | 9.48, s |
| 3 | 73.5 | 24 | 9.48, s |
| 4 | 70.3 | 25 | 2.33, dd (J=14.25, 2.79Hz) |
| 5 | 38.1 | 26 | 2.34, dd (J=14.25, 2.79Hz) |
| 6 | 71.8 | 27 | 3.3, dt (J=10.26, 2.79Hz) |
| 7 | 38.3 | 28 | 3.18, t (J=2.79Hz) |
| 8 | 180.4 | 29 | 7.42, dd (J=8.60, 1.90Hz) |
| 9 | __ | 30 | 7.41, dd (J=8.56, 1.90Hz) |
| 10 | __ | 31 | 7.06, dd (J=8.56, 1.90 Hz) |
| 11 | __ | 32 | 6.50, d (J=17.56Hz) |
| 12 | __ | 33 | 6.25, dt (J=17.56, 7.30Hz) |
| 13 | 66.6 | 34 | 3.81, d (J=7.30Hz) |
| 14 | __ | 35 | 3.81, d (J=7.30Hz) |
| 15 | 123.1 | 36 | 2.13, dd (J=14.50, 2.79Hz) |
| 16 | 132.3 | 37 | 2.14, dd (J=14.50, 2.79Hz) |
| 17 | 116.1 | 38 | 3.40, q (J=2.79Hz) |
| 18 | 146.5 | 39 | 5.60, s |
| 19 | 146.5 | ||
| 20 | 114.8 |
*
As shown in Figure2.