Assignments of carbon and proton signals of M-9 and demethoxycurcumin
No. | Carbon Signals | Proton Signals | ||||
|---|---|---|---|---|---|---|
| M-9 | Demethoxycurcumin | M-9 | Demethoxycurcumin | |||
| 1 | 29.0 | 140.8 | 2.71 (2H, t, 7.5 Hz) | 7.55 (1H, d, 16.2 Hz) | ||
| 2 | 41.6 | 120.9 | 2.84 (2H, t, 7.5 Hz) | 6.77 (1H, d, 16.2 Hz) | ||
| 3 | 199.2 | 183.4 | ||||
| 4 | 127.7 | 101.0 | 6.22 (1H, d, 15.5 Hz) | 6.05 (1H, s) | ||
| 5 | 143.6 | 183.3 | 7.35 (1H, dd, 10.4, 15.4 Hz) | |||
| 6 | 124.2 | 121.1 | 6.93 (1H, dd, 10.2, 15.4 Hz) | 6.70 (1H, d, 15.8 Hz) | ||
| 7 | 141.9 | 140.5 | 6.96 (1H, d, 16.0 Hz) | 7.54 (1H, d, 15.8 Hz) | ||
| 1′ | 131.4 | 125.9 | ||||
| 2′, 6′ | 129.2 | 130.5 | 7.00 (2H, d, 8.1 Hz) | 7.57 (2H, d, 8.0 Hz) | ||
| 3′, 5′ | 115.1 | 116.0 | 6.64 (2H, d, 8.1 Hz) | 6.82 (2H, d, 8.0 Hz) | ||
| 4′ | 155.5 | 159.9 | ||||
| 1″ | 128.1 | 126.4 | ||||
| 2″ | 110.3 | 111.3 | 7.16 (1H, br.s) | 7.33 (1H, br.s) | ||
| 3″ | 148.4 | 149.5 | ||||
| 4″ | 148.0 | 148.1 | ||||
| 5″ | 115.7 | 115.8 | 6.76 (1H, d, 8.1 Hz) | 6.82 (1H, d, 8.0 Hz) | ||
| 6″ | 121.9 | 123.3 | 6.96 (1H, br.d, 8.1 Hz) | 7.15 (1H, br.d, 8.0 Hz) | ||
| −OCH3 | 55.7 | 55.7 | 3.80 (3H, s) | 3.84 (3H, s) | ||
All spectra were recorded on an AV-600 or ARX-300 spectrometer, in dimethyl sulfoxide-d6.