Table 3 ¹H NMR and ¹³C NMR chemical shifts of (+)-catechin (1) and (-)-epicatechin (2) isolated from the heartwood of Dicorynia guianensis

2

81.5

4.55; 1H; d (7.4)

4.81; 1H; s

3

67.45

4.03; 1H; dq (7.83; 5.43)

4,15; 1H; m

4

27.2

α-2.82; 1H; dd (5.5; 16.1)

α-2.83; 1H; dd (5.4; 16.0)

β-2.41; 1H; dd (5.5; 16.1)

β-2.75; 1H; dd (5.4; 16.0)

5

156.46

–

–

6

94.92

5.85; 1H; d (2.3)

5.81; 1H; d (1.96)

7

157.1

–

–

8

97.2

5.92; 1H; d (2.3)

5.92; 1H; d (1,96)

9

155.47

–

–

10

99.92

–

–

1’

130.80

–

–

2’

113.90

6.83; 1H; d (1.9)

6.95; 1H; (s)

3’

144.90

–

–

4’

147.2

–

–

5’

120.4

6.77; 1H; d (1.9)

6.72; 1H; d (1.8)

6’

118.8

6.75; 1H; dd (1.9; 8.1)

6.81; 1H; d (1.8; 8.1)