Table 2 ¹H NMR (400 MHz), ¹³C NMR and DEPT (100 MHz), H–H COSY and HMBC spectroscopic data for Compound 2 in CD₃OD

1

206.39

2

5.71 (dd, J = 10.02, 2.81)

126.98 (CH)

H-3, H-4

C-1, C-3, C-4, C-10

3

6.80 (ddd, J = 9.83, 4.70, 2.33)

146.73 (CH)

H-2, H-4

C-1, C-2, C-5

4

3.30 (m)

2.78 (dd, J = 21.65, 5.06)

33.06 (CH₂)

H-2, H3

C-2, C-3, C-5, C-10

5

135.34 (C)

6

5.55 (brd)

124.79 (CH)

C-4, C-7, C-10

7

1.90 (m)

2.18 (m)

25.28 (CH₂)

H-8

C-7, C-9, C-10

8

1.82 (m)

35.78 (CH)

H-7

9

33.82 (CH)

10

50.73 (C)

11

24.38 (CH₂)

12

28.82 (CH₂)

13

78.55 (C)

14

103.52 (C)

15

211.15 (C)

16

55.81 (CH)

17

87.51 (C)

18

172.71 (C)

19

1.30 (s)

19.61 (CH₃)

20

1.77 (s)

82.33 (C)

21

19.37 (CH₃)

22

4.19 (m)

70.16 (CH)

C-20, C-23, C-24

23

31.63 (CH₂)

24

33.70 (C)

25

48.50 (CH)

26

167.84

27

3.56 (m)

4.68 (m)

60.84 (CH₂)

C-25, C-26

28

1.15 (s)

12.89 (CH₃)