Table 2 Umbelliferone in comparision with hydroxylated (esculetin), glucosylated (skimmin) and methylated umbelliferone (herniarin) on ¹H-NMR and ¹³C-NMR analyses

2

160.92

158.21

158.64

160.77

3

6.20 (d, J = 9.4 Hz).

111.87

6.70 (d, J = 2.3 Hz)

113.61

6.33 (d, J = 9.5 Hz)

113.75

6.30 (d, J = 9.4 Hz)

112.89

4

7.93 (d, J = 9.4 Hz)

145.00

7.35 (d, J = 8.4 Hz)

127.73

8.01 (d, J = 9.5 Hz)

144.74

8.00 (d, J = 9.5 Hz)

144.84

4a

111.75

112.72

113.61

101.19

5

7.52 (s)

130.18

7.06 (s)

116.69

7.65 (d, J = 8.6 Hz)

129.91

7.64 (d, J = 8.5 Hz)

129.97

6

6.79 (dd, J = 8.4, 2.3 Hz)

113.59

139.02

7.05 (d, J = 2.3 Hz)

114.13

6.96 (dd, J = 8.6, 2.4 Hz)

112.96

7

161.76

159.16

160.68

162.96

8

6.72 (s)

102.63

6.74 (dd, J = 8.5, 2.3 Hz)

102.36

7.02 (dd, J = 8.6, 2.3 Hz)

103.63

7.01 (d, J = 2.4 Hz)

75.85

8a

155.97

151.00

155.50

155.91

1’

5.03 (d, J = 7.5 Hz)

100.43

56.42

2’

3.44 (dd, J = 10.9, 6.1 Hz)

73.52

3’

3.38 – 3.22 (m)

77.57

4’

3.13 (s)

70.03

5’

3.68 (dd, J = 2.9, 1.1 Hz)

76.85

6’

4.28 (d, J = 9.1 Hz)

61.05

7-OH

10.59 (s)

9.84 (s)

6-OH

10.09 (s)

7-OCH₃

3.86 (s)