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1H NMR and 13C NMR data for compound 4 (in CDCl3, 500 and 125 MHz).
| No. | δC (m) | δH (m, J, Hz) | No. | δC (m) | δH (m, J, Hz) |
|---|---|---|---|---|---|
| 2 | 78.1 s | 9 | 157.8 s | ||
| 3 | 50.3 t | 2.64 s | 10 | 118.7 s | |
| 4 | 191.6 s | 11 | 45.5 t | 3.94 s | |
| 5 | 128.7 d | 7.56 (d) 8.2 | 12 | 205.3 s | |
| 6 | 117.0 d | 6.82 (d) 8.2 | 13 | 29.9 q | 2.27 s |
| 7 | 143.8 s | 14,15 | 26.4 q | 1.57 s | |
| 8 | 127.2 s | 16 | 63.7 t | 4.46 s |
