| Position | 1H NMR | 13C NMR | DEPT-135 | [10] | 1H NMR | 13C NMR |
| CHO | 9.94, s | 195.4 | 195.4 | 9.90, s | 196 | 2(−OH) | 11.68, s | 157.9 | — | — | 156.3 | NH | 8.19, s | — | — | — | — | 8a | — | 140.2 | — | 8.25, s | 142.3 | 9a | — | 145.1 | — | — | 144.8 | 3 | — | 115.5 | — | — | 114.7 | 4 | 8.05, s | 125.9 | 125.9 | — | 124.3 | 5 | 7.95 (1H, d, J = 7.75, 2.1 Hz) | 119.8 | 119.8 | 8.00, d | 120.5 | 4b | — | 125.3 | — | — | 116.3 | 6 | 7.41, s | 123.7 | 123.7 | — | 108.5 | 7 | 7.43 (1H, dd, J = 7.75, 2.1 Hz) | 120.9 | 120.9 | — | 158.5 | 8 | 7.99 (1H, dd, J = 8, 2.1 Hz) | 110.9 | 110.9 | — | 95.6 | 4a | — | 117.4 | — | — | 117.0 | 1 | — | 109.1 | — | — | 108.9 | 1′ | 3.66, (1H, d, J = 6.90 Hz) | 22.9 | 22.9 | 3.65, d, J = 7 Hz | 22.6 | 2′ | 5.35, 1H (t) | 121.3 | 121.3 | 5.35, t, J = 6 Hz | 121.6 | 3′ | — | 134.2 | — | — | 131.7 | 4′ | 1.91, s | 25.7 | 25.8 | 1.66, s | 25.7 | 5′ | 1.80, s | 18.2 | 18.2 | 1.82, s | 17.9 | |
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