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Table 1 The 1H-NMR (600 MHz) and 13C-NMR (150 MHz) data of compound 1 and 3–5 (in DMSO); δ in ppm; J in Hz

From: Antibacterial activities of triterpenoidal compounds isolated from Calothamnus quadrifidus leaves

Position

1

3

4

5

δC

δH

δC

δH

δC

δH

δC

δH

1

38.84

 

38.20

 

39.38

 

40.75

 

2

27.61

 

27.55

 

67.43

 

67.66

 

3

77.14

3.39 (1 H, brs)

82.52

3.83 (1 H, s)

77.30

3.62 (1 H, brs)

82.65

3.62 (1 H, brs)

4

38.93

 

38.87

 

38.87

 

40.40

 

5

55.25

 

55.17

 

55.87

 

55.87

 

6

18.42

 

18.43

 

18.46

 

77.35

2.13 (1 H, m)

7

34.37

 

34.45

 

36.82

 

40.40

 

8

40.66

 

40.49

 

40.40

 

39.38

 

9

50.36

 

50.32

 

48.97

 

48.97

 

10

37.18

 

37.22

 

38.02

 

38.02

 

11

20.91

 

20.91

 

21.54

 

22.61

 

12

25.52

 

25.47

 

25.56

 

23.81

 

13

38.04

 

38.04

 

38.95

 

38.95

 

14

42.45

 

42.45

 

42.48

 

42.48

 

15

30.55

 

30.55

 

31.81

 

30.85

 

16

32.16

 

32.16

 

32.17

 

32.17

 

17

55.94

 

55.84

 

55.87

 

55.87

 

18

47.07

 

47.02

 

47.07

 

47.07

 

19

49.07

 

48.97

 

48.93

 

48.97

 

20

150.82

 

150.67

 

150.37

 

150.60

 

21

29.66

 

29.53

 

29.09

 

29.28

 

22

36.80

 

36.70

 

36.81

 

36.81

 

23

28.55

1.32 (3 H, s, Me)

63.21

3.70 (2 H, s)

62.87

3.69 (2 H, s)

63.26

3.70 (2 H, s)

24

16.17

1.11 (3 H, s, Me)

16.42

1.32 (3 H, s, Me)

17.35

1.32 (3 H, s, Me)

17.35

1.38 (3 H, s, Me)

25

16.27

0.87 (3 H, s, Me)

17.37

0.91 (3 H, s, Me)

17.58

0.81 (3 H, s, Me)

17.58

0.76 (3 H, s, Me)

26

16.41

0.77 (3 H,s, Me)

17.60

1.07 (3 H,s, Me)

16.48

0.96 (3 H,s, Me)

18.46

1.08 (3 H,s, Me)

27

14.84

0.93 (3 H, s, Me)

16.14

1.08 (3 H, s, Me)

14.80

0.71 (3 H, s, Me)

14.80

0.82 (3 H, s, Me)

28

177.72

12.03 (1 H, brs)

177.60

12.03 (1 H, brs)

177.98

12.07 (1 H, brs)

177.75

12.04 (1 H, brs)

29

110.11

4.69 (1 H, brs, H-29a)

4.56 (1 H, brs, H-29b)

109.96

4.69 (1 H, brs, H-29a)

4.57 (1 H, brs, H-29b)

109.21

4.69 (1 H, brs, H-29a)

4.57 (1 H, brs, H-29b)

110.10

4.69 (1 H, brs, H-29a)

4.57 (1 H, brs, H-29b)

30

19.39

1.65 (3 H,s, Me)

19.39

1.65 (3 H,s, Me)

19.40

1.65 (3 H,s, Me)

19.40

1.65 (3 H,s, Me)

31

  

172.53

     

32

  

21.55

1.91 (3 H,s, Me)

    
  1. a,b represent the two geminal protons on C29