Table 4 1D and 2D-NMR data of 9 in DMSO (2.504 ppm-¹H/39.4 ppm-¹³C) at 500 MHz

2

–

153.8

–

4

3.73 (dd, 1H, J = 9.3, 6.6 Hz)

4.11 (dd, 1H, J = 9.0, 9.0 Hz)

47.0

2, 5, 6

2, 5, 6

5

4.72 (m, 1H)

71.7

2

6

3.41 (dd, 1H, J = 5.7, 5.7 Hz)

41.2

8, 5, 4

NHCOCH₃

8.23 (t, 1H, J = 5.7)

–

8, 6

8

–

169.9

–

9

1.83 (s, 3H)

22.3

8

1′

–

140.3 (d, J _CF  = 10.5 Hz)

–

2′

7.55 (dd, 1H, J = 10.9, 2.3 Hz)

105.2 (d, J _CF  = 29.8 Hz)

3′, 6′, 4′, 1′

3′

–

161.1 (d, J _CF  = 240.6 Hz)

–

4′

–

74.0 (d, J _CF  = 21.2 Hz)

–

5′

7.83 (dd, 1H, J = 8.7, 7.7 Hz)

139.0 (d, J _CF  = 3.4 Hz)

3′, 1′, 4′, 2′(w)

6′

7.19 (dd, 1H, J = 8.8, 2.4 Hz)

115.5 (d, J _CF  = 2.9 Hz)

2′, 4′