Table 1 ¹H NMR data of dibenzocyclooctadiene lignans from Schisandra chinensis fruits (600 MHz, CDCl₃, δ_H, coupling pattern, J in Hz)

4

6.47, s

6.51, s

6.51, s

6.44, s

6.48, s

6

2.52, dd, 13.8, 7.2

2.44, dd, 13.8, 1.2

2.56, dd, 13.8, 7.2

2.43, dd, 13.8, 1.2

2.24, dd, 13.2, 9.6

2.02, br. d, 13.2

2.17, dd, 13.2, 10.2

2.05, br. d, 13.2

2.24, dd, 13.2, 9.6

2.01, br. d, 13.2

7

1.85, m

1.89, m

1.77, m

1.86 m

1.77, m

8

1.76, m

1.80, m

1.89, m

1.92, m

1.87, m

9

2.22, dd, 13.2, 9.6

2.00, br. d, 13.2

2.30, dd, 13.2, 9.6

2.03, br. d, 13.2

2.57, dd, 13.2, 7.2

2.52, br. d, 13.2

2.58, dd, 13.8, 7.8

2.47, dd, 13.8, 1.8

2.53, dd, 13.2, 7.2

2.46, dd, 13.2, 1.8

11

6.61, s

6.37, s

6.37, s

6.65

6.62, s

17

0.95, d, 7.2

0.99, d, 7.2

0.74, d, 7.2

0.76, d, 7.2

0.72, d, 6.6

18

0.70, d, 7.2

0.73, d, 7.2

0.97, d, 7.2

0.98, d, 7.2

0.96, d, 7.2

1-OMe

3.76

3.87, s

3.86, s

-

3.77, s

12-OMe

3.91

3.89, s

3.88, s

3.89

-

13-OMe

-

3.90, s

3.91, s

3.91

3.93, s

14-OMe

3.49

-

-

3.57

3.51, s

–O–CH₂–O–

5.94, d, 1.2

5.90, d, 1.2

5.97, d, 1.8

5.93, d, 1.8

5.95, br. s

5.92, br. s

6.01, d, 1.8

5.96, d, 1.8

5.95, d, 1.2

5.94, d, 1.2