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Table 1 Spectral determination of (+/−) catechins in 1H-NMR and 13C-NMRa

From: Antigenotoxic properties of Paliurus spina-christi Mill fruits and their active compounds

Atom C/H

δH (ppm)

J (Hz)

δC (ppm)

HMBC (H → C)

2

4.55 d

7.4

82.88

C-4, C-3, C-9

3

3.96 ddd

5.5/7.5/8.1

68.83

C-10

4

(α) 2.84 dd

15.9/5.5

28.54

C-2, C-3, C-9, C-10

(β) 2.84 dd

15.9/8.0

5

-

-

156.92

 

6

5.84 d

2.2

95.51

C-8, C-10

7

-

-

157.59

 

8

5.91 d

2.2

96.30

C-6, C-10

9

-

-

157.86

 

10

-

-

100.83

 

1′

-

-

132.35

 

2′

6.82 d

1.9

115.27

C-1′, C-2

3’

-

-

146.23

 

4’

-

-

146.23

 

5’

6.75 d

8.2

116.08

C-1′

6’

6.70 dd

8.2/1.9

120.03

C-2

  1. a1H-NMR:600 MHz, CD3OD; 13C-NMR:150 MHz, CD3OD