Table 2.
NMR assignments of the main constituents detected in the methanol extract of S. hedysaroides aerial part.
| Class of Compounds | δH | δC | HMBC | COSY/NOESY |
|---|---|---|---|---|
| Deltoin and decursin | ||||
| 2 | - | 162 | - | - |
| 3 | 6.23 | 111.0 | 163 112.6 | 7.85 H-4 COSY |
| 4 | 7.85 | 144.0 | 163 154 123 | 6.20 H-3 COSY |
| 5 | 7.44 | 123.0 | 144 163 154 | - |
| 6 | - | 127 | - | - |
| 7 | - | 164 | - | - |
| 8 | 6.75 | 96.0 | 163 154 127 113 | - |
| 9 | - | 154 | - | - |
| 10 | - | 113 | - | - |
| 11 Deltoin | 3.36–3.30 | 28.7 | 127 89 82 | 4.90 COSY |
| 12 Deltoin | 4.90 (under methanol) | 89 | 3.30–3.36 COSY | |
| 11 Decursin | 3.40 | 28.0 | 127 89 82 | 4.87 COSY |
| 12 Decursin | 4.86 (under methanol) | 77 | 3.30–3.36 COSY | |
| 14 | 1.59 | 20.9 | 82 89 20 | |
| 15 | 1.63 | 20.5 | 82 89 20 | |
| Tigloyl moiety of deltoin and decursin | ||||
| 1′ | - | 167 | - | - |
| 2′ | - | 130 | - | - |
| 3′ | 6.40 | 137 | 167 137 130 | |
| 4′ | 1.60 | 20 superimposed | 167 137 130 | |
| 5′ | 1.64 | 20 superimposed | 137 130 | |
| Furocumarins | ||||
| 11 | 6.68–6.60 | 106–104 | - | - |
| 12 | 7.60–7.65 | 145 | 158 116 | - |
| Flavonols | ||||
| 6, 8 | 6.40 6.30 6.19 | 99.1 96.5 92.5 | ||
| 2′ | 7.68 | 126.5 | ||
| 5′ | 6.73 | 115 | ||
| 6′ | 7.25 | 114.5 | ||
| Sucrose | ||||
| 1 | 5.30 | 92.8 | - | - |
| 2 | 3.55 | 76.4 | ||
| 6 | 3.82 | 62.6 | - | - |
| 1′ | 3.67 | 76.4 | - | - |
| 3′ | 4.21 d | 77.4 | - | - |