Table 1 ¹H-NMR data of polyphenols isolated from Acacia hydaspica (Coupling constant J in Hertz)

H-2

4.61 (d, J = 7.0 Hz)

4.46 (d, J = 7.6 Hz)

7.11 (s)

H-3

3.88–3.94 (m)

3.79–3.82 (m)

3.79 (s, OCH3)

H-4α

b

2.71 (dd, J = 16.3 Hz, J = 5.3 Hz)

2.45 (dd, J = 16.5, 7.9 Hz)

2.64 (dd, J = 16.4, 5.3 Hz)

2.33 (dd, J = 16.1, 7.9 Hz)

–

H-6

6.11 (d, J = 2.2 Hz)

5.67 (d, J = 2.3 Hz)

7.11 (s)

H-8

6.17 (d, J = 2.2 Hz

5.87 (d, J = 1.8 Hz)

–

H-2′

6.72 (d, J = 1.5 Hz)

6.70 (d, J = 1.8)

–

H-5′

6.68 (d, J = 8.1 Hz)

6.67 (d, J = 8.2 Hz)

–

H-6′

6.60 (dd, J = 8.1 Hz, J = 1.5 Hz)

6.57 (dd, J = 8.2 Hz, J = 1.8 Hz)

–

OH-3

5.01 (d, J = 5.1 Hz)

4.84 (d, J = 4.7 Hz)

–

Galloyl

7.04 (s)

–

–