TABLE 1.
1H NMR data of compounds 1–6 in CDCl3 at 600 MHz.
| No. | 1 | 2 | 3 | 4 | 5 | 6 |
| 1 | 2.71, t (10.5) | |||||
| 3 | 3.03–2.99, m | 3.14–3.08, m | 3.15, d (12.1) | 3.03, d (12.2) | 3.16, dt (12.1, 2.8) | |
| 4 | 2.23, dd (13.5, 6.1) | 1.95, ddt (14.0, 5.3, 2.7) | 1.96, ddt (13.3, 5.5, 2.8) | 2.25, dd (14.1, 6.2) | 2.47, d (16.9) | 2.01–1.96, m |
| 1.75, dd (13.5, 6.2) | 1.62, ddd (14.0, 12.5, 2.1) | 1.63, ddd (13.3, 12.1, 2.1) | 1.88–1.78, m | 2.38–2.29, m | 1.65, d (13.2) | |
| 5 | 2.05, dd (14.2, 8.5) | 2.03–1.98, m | 2.04–1.99, m | 2.11–2.04, m | 1.71–1.62, m | 2.05–2.02, m |
| 1.47, td (14.2, 6.2) | 1.77, dt (13.5, 2.7) | 1.81–1.79, m | 1.49, dt (13.3, 6.2) | 1.79, t (13.2) | ||
| 6 | 2.11–2.07, m | 1.91–1.86, m | 1.91, dq (7.0, 3.0) | 2.17–2.11, m | 2.08–2.00, m | 1.96–1.91, m |
| 7 | 3.10–3.03, m | 2.89–2.83, m | 2.98–2.92, m | 3.16, br s | 2.08–2.00, m | 2.91–2.86, m |
| 8 | 1.82–1.77, m | 1.82–1.79, m | 1.58, t (12.0) | 1.60, t (12.0) | 1.60–1.56, m | 1.69, d (12.0) |
| 1.41, t (12.5) | 1.40, dd (13.3, 10.7) | 1.50, dd (12.0, 8.4) | 1.42, dd (12.0, 7.3) | 1.53–1.50, m | 1.46, dd (12.0, 8.1) | |
| 10 | 2.32, d (17.5) | 2.13, d (16.1) | 2.07, d (15.7) | 2.17–2.11, m | 3.64, dd (10.5, 6.2) | 3.73, s |
| 1.90, d (17.5) | 1.86–1.82, m | 1.85–1.81, m | 2.11–2.04, m | |||
| 11 | 4.67, d (10.3) | 4.75, d (13.2) | 4.75, d (13.3) | 4.67, d (12.0) | 4.91, d (17.8) | 5.00, d (13.6) |
| 4.65, d (10.3) | 4.69, d (13.2) | 4.68, d (13.3) | 4.62, d (12.0) | 4.81, d (17.8) | 4.88, d (13.6) | |
| 13 | 0.93, d (7.2) | 0.88, d (6.9) | 0.86, d (7.0) | 0.93, d (7.1) | 0.96, d (5.8) | 0.91, d (7.0) |
| 14 | 1.11, s | 1.12, s | 0.92, s | 1.06, s | 0.95, s | 1.07, s |
| 15 | 3.46, d (10.6) | 3.30, d (10.6) | 3.52, s | 3.49, s | 1.07, s | 0.82, s |
| 3.39, d (10.6) | 3.26, d (10.6) |