Table 3 ¹H,¹³C-NMR spectral data of tri-n-butyl chebulate [in DMSO-d6, TMS]

1

162.9

1′

3.96 (2H, m)

64.9

2

2′

1.47 (2H, m)^a

30.0^d

3

5.27 (1H, d, J = 0.8 Hz)

76.4

3′

1.25 (2H, m)^b

18.5^e

4

3.70 (1H, dd, J = 0.8 Hz, 7.6 Hz)

35.7

4′

0.84 (3H, m)^a

13.5^f

5

115.7

1″

3.99 (2H, m)

64.9

6

145.5

2″

1.51 (2H, m)^a

30.0^d

7

138.8

3″

1.29 (2H, m)^b

18.5^e

8

142.7

4″

0.87 (3H, m)^c

13.5^f

9

6.92 (1H, s)

107.5

1‴

3.90 (2H, t, J = 2.4 Hz)

63.8

10

114.6

2‴

1.35 (2H, m)^c

29.9^d

11

3.07 (1H, m)

43.2

3‴

1.10 (2H, m)^b

18.2^e

12

2.76 (1H, dd, J = 16.8, 10.8 Hz)

33.7

4‴

0.75 (3H, t, J = 7.2 Hz)^c

13.3^f

2.35 (1H, dd, J = 16.8, 4.0 Hz)

13

169.3

14

172.4

15

171.0