Carbon No.

S1

S2

S3

S4

S5

1

37.4

37.3

37.2

37.5

37.0

2

32.0

31.6

31.4

30.2

29.6

3

71.0

71.8

70.1

78.1

77.6

4

42.5

42.3

41.8

39.0

38.3

5

141.5

140.8

140.4

140.8

140.4

6

120.7

121.7

121.1

121.8

121.3

7

32.0

31.9

31.9

32.4

31.8

8

31.5

31.6

31.9

31.7

31.2

9

50.4

50.2

49.6

50.4

49.8

10

36.7

36.5

38.7

37.2

36.6

11

20.9

21.1

21.1

21.2

20.6

12

39.9

39.8

39.8

40.1

39.6

13

40.4

42.3

41.8

40.6

40.1

14

56.5

56.8

56.1

56.7

56.1

15

31.6

24.3

23.8

32.6

32.0

16

78.7

28.3

28.7

78.8

78.5

17

63.2

56.1

55.4

63.6

62.9

18

15.9

11.9

11.8

16.5

16.0

19

18.9

19.4

19.1

19.4

18.9

20

41.4

36.2

40.3

41.6

41.2

21

14.7

18.8

20.9

15.7

15.2

22

97.9

34.0

137.9

98.3

98.0

23

34.2

26.1

128.7

34.7

34.0

24

30.4

45.9

50.5

31.0

30.4

25

31.0

29.2

31.3

31.6

30.8

26

47.5

19.1

20.6

48.1

47.3

27

18.9

19.8

18.9

19.8

19.2

28

-

23.1

25.5

-

-

29

-

12.0

12.1

-

-

1`

-

100.3

100.8

100.3

99.9

2`

-

77.8

73.4

77.8

75.6

3`

-

78.0

76.7

78.0

84.6

4`

-

76.9

73.3

78.7

69.3

5`

-

78.7

76.9

76.9

74.3

6`

-

61.3

61.1

61.3

61.9

1``

-

-

-

102.0

101.5

2``

-

-

-

72.5

71.7

3``

-

-

-

72.7

72.0

4``

-

-

-

73.9

73.4

5``

-

-

-

69.5

68.9

6``

-

-

-

18.6

18.0

1```

-

-

-

102.9

105.1

2```

-

-

-

72.8

74.2

3```

-

-

-

72.5

77.6

4```

-

-

-

74.1

70.9

5```

-

-

-

70.4

77.3

6```

-

-

-

18.5

61.5

Table 2: 13C NMR chemical shifts (δ in ppm) for compounds S1 (CDCl3, 75 MHz)
and S4-S5 (DMSO, 75 MHz)