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1H- and 13C-NMR data of compound 2 in DMSO-d6a.
| No. | δC | δH ( J in Hz) | No. | δC | δH ( J in Hz) |
|---|---|---|---|---|---|
| 1 | 167.6, C | 6 | 146.6, C | ||
| 3 | 108.6, C | 7 | 151.1, C | ||
| 3a | 132.9, C | 7a | 114.6, C | ||
| 4 | 121.2, CH | 6.84, d (8.5) | 8 | 25.6, CH3 | 1.74, s |
| 5 | 125.7, CH | 7.01, d (8.5) | 9 | 52.4, CH3 | 2.94, s |
a Measured at 500 MHz for 1H and 125 MHz for 13C.
