TABLE 2.
1H (600 MHz) and 13C (150 MHz) NMR data for compound 2 (CDCl3).
| Position | δ H (J in Hz) | δ C, type | HMBC | NOESY | 1H-1H COSY |
|---|---|---|---|---|---|
| 1 | 3.03 m | 85.3, CH | C-10, C-17, 1-OCH3 | H-3β, H-10, 1-OCH3 | H-2α, β |
| 2α | 2.27 m | 26.1, CH2 | — | — | H-1, H-2β, H-3α, β |
| 2β | 1.93 m | — | — | H-1, H-2α, H-3α, β | |
| 3α | 1.70 m | 34.7, CH2 | — | H-18α | H-2α,β, H-3β |
| 3β | 1.59 m | C-19 | H-1, H-5 | H-2α,β, H-3α | |
| 4 | — | 39.3, C | — | — | — |
| 5 | 2.03 d (6.6) | 48.8, CH | C-7, C-10, C-17, C-18, C-19 | H-3β, H-18α, β | H-6 |
| 6 | 4.10 d (6.6) | 82.1, CH | C-4, C-8, C-17, 6-OCH3 | H-9, 6-OCH3 | H-5, H-7 |
| 7 | 2.32 s | 44.6, CH | C-9, C-11, C-15 | H-15, 6-OCH3 | H-6 |
| 8 | — | 76.9, C | — | — | — |
| 9 | 2.63 m | 45.7, CH | C-12, C-13, C-15 | H-6 | H-10, H-14 |
| 10 | 2.15 m | 42.6, CH | C-8, C-17 | H-1, H-14 | H-9, H-12α, β |
| 11 | — | 50.3, C | — | — | — |
| 12α | 2.99 m | 40.1, CH2 | C-11, C-14, C-16 | — | H-10, H-12β |
| 12β | 1.89 m | C-9, C-11, C-16 | H-14 | H-10, H-12α | |
| 13 | — | 76.9, C | — | — | — |
| 14 | 4.95 d (4.08) | 78.6, CH | C-8, C-16, ArC = O | H-10, H-12β | H-9 |
| 15 | 5.80 d (9.9) | 125.2, CH | C-9, C-13 | H-7, H-17, 8-OCH3 | H-16 |
| 16 | 6.03 d (9.9) | 137.2, CH | C-8 | H-17 | H-15 |
| 17 | 2.96 s | 62.4, CH | C-5, C-6, C-8, C-10, C-19 | H-15, H-16, H-21, H-22 | — |
| 18α | 3.29 d (8.76) | 80.5, CH2 | C-3, C-5, C-19, 18-OCH3 | H-3α, H-5, H-19α, β, 18-OCH3 | H-18β |
| 18β | 3.65 d (8.76) | C-3, C-19, 18-OCH3 | H-5, H-19β, 18-OCH3 | H-18α | |
| 19α | 2.56 m | 54.1, CH2 | C-3, C-5, C-17 | H-18α | H-19β |
| 19β | 2.62 m | C-3 | H-18α,β | H-19α | |
| 21α | 2.49 m | 49.2, CH2 | — | H-17 | H-22 |
| 21β | 2.54 m | — | H-17 | H-22 | |
| 22 | 1.05 t (7.38) | 13.3, CH3 | — | H-17 | H-21α, β |
| 1-OCH3 | 3.23 s | 56.2, CH3 | C-1 | H-1 | — |
| 6-OCH3 | 3.26 s | 57.8, CH3 | C-6 | H-6, H-7 | — |
| 8-OCH3 | 3.12 s | 49.1, CH3 | C-8 | H-15, H-2′, 6′ | — |
| 18-OCH3 | 3.29 s | 59.2, CH3 | C-18 | H-18α, β | — |
| ArC = O | — | 167.3 C | — | — | — |
| 1′ | — | 122.7, C | — | — | — |
| 2′, 6′ | 7.98 d (8.82) | 131.9, CH | C-4′, ArC = O | 8-OCH3 | H-3′, 5′ |
| 3′, 5′ | 6.89 d (8.82) | 113.5, CH | C-1′ | 4′-OCH3 | H-2′, 6′ |
| 4′ | — | 163.4, C | — | — | — |
| 4′-OCH3 | 3.84 s | 55.4, CH3 | C-4′ | H-3′, 5′ | — |