Table 2 1H (500 Hz), and 13C (100 Hz) -NMR data of compound (3) isolated from the Ethyl acetate fraction of P. dulce leaves (DMSO-d6).

From: Isolation and quantification of polyphenolics, exploration of antioxidant, cytotoxicity, and wound healing activities of Pithecellobium dulce (Roxb.) Benth

Carbon no.

δ 1H-NMR (ppm), J in Hz

δ 13C-NMR (ppm)

DEPT

135

HMBC

1

–

137.41

C

 

2

6.77 (s)

113.92

CH

 

3

–

145.93

C

 

4

–

144.56

C

 

5

6.66 (d, 1 H, J = 7.8 Hz)

116.5

CH

 

6

6.45 (d, 1 H, J = 7.7)

121.59

CH

 

7a

2.52 (dd, 1 H, J = 11, 13)

32.61

CH2

 

7b

2.92 (dd, 1 H, J = 5, 12)

 

8

2.7 (m, 1 H)

44.20

CH

137.41 (C-1)

9a

3.66 (dd, 1 H, J = 5.88, 8)

68.26

CH2

 

9b

3.89 (dd, 1 H, J = 7.9, 5.9)

 

OCH3 (C-3)

3.76 (s, 3 H)

55.92

CH3

145.93 (C-3)

1ʹ

–

132.91

C

 

2ʹ, 6ʹ

6.57 (s, 2 H)

104

CH

132.91 (C-1ʹ)

144.05 (C-4ʹ)

3ʹ, 5ʹ

–

147.6

C

 

4ʹ

–

144.05

C

 

7ʹ

4.91 (d, 1 H, J = 6)

86.54

CH

 

8ʹ

2.48 (m, 1 H)

46.12

CH

 

9ʹa

3.71 (dd, 1 H, J = 7.55, 10)

65.76

CH2

 

9ʹb

4.01 (dd, 1 H, J = 9.47, 6.7)

 

OCH3 (C-3ʹ,5ʹ)

3.77 (s, 6 H)

56.01

CH3

147.6 (C-3ʹ,5ʹ)

1″

4.36 (d, 1 H, J = 8)

106.79

CH

65.7 (C-9ʹ)

2″

3.21 (dd, 1 H, J = 7.9, 8.8)

72.61

CH

 

3″

3.38 (m, 3 H)

76.63

CH

 

4″

69.85

CH

 

5″

73.61

CH

 

6″ a

3.61 (dd, 1 H, J = 5, 11)

63.33

CH2

 

6″ b

3.81 (dd, 1 H, J = 12, 2)

 
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