Table 1.
NMR spectroscopic data of compound 1 (DMSO-d6) a.
| Position | 1H (mult, J in Hz) b | 13C c | HMBC | 1H-1H COSY |
|---|---|---|---|---|
| 1 | 157.5 d | |||
| 2 | 6.42 (s) | 104.7 | 6 | 4,6 |
| 3 | 158.3 | |||
| 4 | 6.63 (s) | 112.1 | 2, 3, 5-CH3, 6 | 2,6 |
| 5 | 140.2 | |||
| 6 | 6.44 (s) | 112.5 | 1, 2, 4, 5-CH3 | 2,4 |
| 1′ | 157.5 d | |||
| 2′ | 6.17 (s) | 103.1 | 1′, 4′, 6′ | 4′,6′ |
| 3′ | 158.6 | |||
| 4′ | 6.35 (s) | 111.4 | 2′, 3′, 6′, 5′-CH3 | 2′,6′ |
| 5′ | 140.3 | |||
| 6′ | 6.25 (s) | 110.1 | 1′, 2′, 4′, 5′-CH3 | 2′,4′ |
| 1′' | 5.51 (d, 4.8) | 100.3 | 3, 3″, 4″ | 2′' |
| 2′' | 4.02 (m) | 71.5 | 1″,3″,2″-OH | |
| 3″ | 3.89 (m) | 69.3 | 1″, 5″ | 2″,4″,3″-OH |
| 4″ | 3.94 (m) | 86.3 | 3″,5″ | |
| 5″ | 3.48 (m, 2H) e | 61.6 | 3″, 4″ | 4″,5″-OH |
| 3′-OH | 9.47 s | |||
| 2″-OH | 4.66 (d, 9.0) | |||
| 3″-OH | 4.87 (t, 5.4) | |||
| 5″-OH | 4.81 (d, 5.4) | |||
| 5-CH3 | 2.24 (s) | 21.3 | 4, 5, 6 | |
| 5′-CH3 | 2.18 (s) | 21.2 | 4′, 5′, 6′ |
a Chemical shifts (δ) in ppm; b 600 MHz; c 150 MHz; d overlapped signal; e overlapped with water signal.