| H/C | (3) In acetone- | (1) In DMSO [13] | δ
H (in ppm, J in Hz) | δ
C (in ppm) | HMBC | δ
H (in ppm) | δ
C (in ppm) |
| 2 | — | 163.1 | — | — | 160.7 | 3 | — | 103.6 | — | — | 100.8 | 4 | — | 182.3 | — | — | 179.1 | 5 | — | 153.8 | — | — | 151.2 | 6 | 6.12 (1H, s) | 101.3 | C-5, 7, 8 | 6.17 | 98.7 | 7 | — | 164.1 | — | — | 160.7 | 8 | — | 107.1 | — | — | 104.3 | 9 | — | 161.0 | — | — | 157.9 | 10 | — | 105.8 | — | — | 103.6 | 11 | 1.91 (1H, m) | 24.2 | C-3, 6′ | 1.88 | 21.5 | | 3.32 (1H, m) | | C-3, 4, C-12 | 3.32 | | 12 | 2.76 (1H, m) | 33.9 | C-13, 1′, 5′, 6′ | 2.55 | 31.2 | 13 | 2.25 (1H, dd, J = 15.6, 7.7) | 38.8 | C-12, 14, 6′ | 1.82 | 35.7 | 14 | 5.47 (1H, s) | 96.5 | C-13, 15 | 5.32 | 93.1 | 15 | 1.19 (3H, d, J = 6.4, CH3) | 16.5 | C-12, 13, 14 | 1.08 | 14.6 | 16 | 6.93 (1H, d, J = 10.0) | 117.6 | C-7, 9, 18 | 6.86 | 114.8 | 17 | 5.65 (1H, d, J = 10.0) | 129.4 | C-16, 18, 19 | 5.74 | 127.3 | 18 | — | 80.2 | — | — | 78.0 | 19 | 1.45 (3H, s, CH3) | 29.8 | C-17, 18 | 1.44 | 27.7 | 20 | 1.45 (3H, s, CH3) | 30.0 | C-17, 18 | 1.42 | 27.9 | 1′ | — | 114.3 | — | — | 111.0 | 2′ | — | 153.6 | — | — | 151.2 | 3′ | 6.49 (1H, s) | 105.5 | C-2′, 4′, 5′ | 6.43 | 103.1 | 4′ | — | 153.2 | — | — | 151.1 | 5′ | — | 135.0 | — | — | 132.5 | 6′ | — | 127.3 | — | — | 124.6 | OH-5 | 13.37 (1H, brs) | — | C-6, 7, 10 | 13.36 | — | OH-13 | 7.96 (1H, brs) | — | — | — | — | OH-14 | — | — | — | 6.93 | — | OH-2′ | 8.44 (1H, brs) | — | — | 9.91 | — | OH-4′ | 8.84 (1H, brs) | — | C-3′ | 9.81 | — |
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