Table 2 ¹H NMR (600 MHz) data of compounds 1–4 in CD₃OD.

δ _H (J in Hz)

δ _H (J in Hz)

δ _H (J in Hz)

δ _H (J in Hz)

1a

3.71 (dd, 11.0, 5.8)

3.71 (dd, 11.0, 5.6)

2.70 (dd, 14.9, 5.7)

2.14 (m)

1b

2.17 (dd, 14.9, 1.9)

2.14 (m)

2a

2.86 (ddd, 13.9, 9.6, 5.8)

2.87 (ddd, 15.9, 9.6, 5.6)

2.97 (m)

2.62 (m)

2b

1.42 (m)

1.44 (m)

2.62 (m)

3

4.04 (dd, 9.6, 8.0)

4.04 (dd, 9.5, 8.2)

6a

2.05 (dd, 13.9, 3.7)

2.02 (m)

4.41 (dd, 3.8, 2.5)

5.91 (d, 6.2)

6b

1.94 (dd, 13.9, 10.9)

2.02 (m)

7

4.37 (dd, 10.9, 3.7)

4.51 (dd, 10.5, 4.2)

5.64 (brs)

6.17 (d, 6.2)

11a

2.30 (ddd, 14.0, 9.4, 7.6)

2.36 (td, 12.9, 11.9, 3.3)

5.75 (dd, 3.8, 3.7)

5.57 (m)

11b

1.63 (m)

1.79 (m)

12a

1.59 (m)

1.75 (m)

2.01 (m)

2.04 (m)

12b

1.59 (m)

1.75 (m)

2.01 (m)

2.04 (m)

15

5.78 (dd, 5.9, 3.4)

5.98 (s)

4.01 (dd, 11.1, 5.7)

4.10 (dd, 10.1, 6.7)

16a

2.15 (dd, 17.7, 3.4)

1.44 (m)

1.51 (m)

16b

1.99 (dd, 17.7, 5.9)

1.44 (m)

1.51 (m)

18

1.24 (d, 2.1)

1.73 (m)

1.32 (d, 2.2)

1.35 (brs)

19

1.37 (m)

1.33 (s)

1.17 (m)

1.15 (m)

20

1.53 (m)

1.61 (m)

1.54 (m)

1.56 (m)

21a

1.60 (m)

1.67 (m)

3.44 (ddd, 11.7, 9.8, 6.6)

3.44 (ddd, 11.4, 9.7, 6.6)

21b

1.21 (m)

1.28 (m)

22a

1.39 (m)

1.72 (m)

2.15 (m)

2.21 (dd, 14.9, 9.7)

22b

1.56 (m)

1.72 (m)

1.18 (m)

1.21 (m)

23

0.94 (s)

0.94 (s)

1.24 (s)

1.26 (s)

24

0.86 (s)

0.87 (s)

1.22 (s)

1.29 (s)

25

0.99 (s)

1.01 (s)

1.38 (s)

1.11 (s)

26

1.32 (s)

1.40 (s)

0.77 (s)

1.05 (s)

27

1.13 (s)

1.28 (s)

0.65 (s)

0.70 (s)

28

1.08 (s)

1.31 (s)

1.17 (s)

1.20 (s)

29

1.11 (d, 7.1)

1.17 (d, 6.8)

1.14 (d, 6.6)

1.14 (d, 6.7)

30

1.00 (d, 6.5)

1.00 (d, 6.5)

1.06 (d, 6.1)

1.06 (d, 6.1)