Table 1 The NMR data of compound 1 and tryptophan in CD₃OD

1

–

140.1, s

–

–

7.21 (1H, s)

128.4, d

2

–

105.5, s

–

–

–

108.2, s

3

–

127.9, s

–

–

–

125.6, s

4

7.40 (1H, d, J = 7.8 Hz)

118.9, d

C-2, C-3, C-6, C-8

H-5

7.62 (1H, d, J = 7.5 Hz)

112.7, d

5

6.97 (1H, t, J = 7.5 Hz)

119.9, d

C-3, C-5

H-4/H-6

7.06 (1H, td, J = 7.5, 2.5 Hz)

120.4, d

6

7.05 (1H, t, J = 7.5 Hz)

122.2, d

C-4, C-8

H-5/H-7

7.14 (1H, td, J = 7.5, 2.5 Hz)

123.1, d

7

7.28 (1H, d, J = 8.1 Hz)

111.9, d

C-3, C-5

H-6

7.39 (1H, brd, J = 7.5 Hz)

119.1, d

8

–

137.9, s

–

–

–

138.5, s

9

2.82 (1H, dd, J = 15.0, 11.2 Hz)

26.9, t

C-1, C-2, C-10, C-11

H-10

3.32 (1H, m)

27.9, t

3.08 (1H, dd, J = 15.0, 3.5 Hz)

C-1, C-2

H-10

3.51 (1H, dd, J = 5.0, 4.5 Hz)

10

4.52 (1H, dd, J = 11.2, 3.5 Hz)

70.7, d

C-9, C-11, C-12

H-9

4.21 (1H, dd, J = 5.0, 4.5 Hz)

54.9, d

11

–

176.3, s

–

–

–

172.1, s

12

–

75.0, s

–

–

–

–

13

1.58 (3H, s)

26.6, q

C-1, C-12, C-14

–

–

–

14

1.61 (3H, s)

29.3, q

C-1, C-12, C-13

–

–

–