Table 2 ¹³C and ¹H chemical shifts assignments for the compound

2

156.4

3

133.2

4

177.3

5

156.6

12.62 (1H, s, 5-OH)

6

98.6

6.19 (1H, d, J = 1.88)

7

164.0

8

93.6

6.41 (1H, d, J = 1.80)

9

161.1

10

103.9

1'

121.1

2'

115.2

7.53 (1H, d, J = 8.08)

3'

144.6

4'

148.3

5'

116.2

6.85 (1H, d, J = 7.84)

6'

121.6

7.55 (1H, d, J = 7.56)

1^G

101.1

5.32 (1H, d, J = 7.44)

2^G

73.9

3.08 (1H, d, J = 9.28)

3^G

75.8

3.23 (1H, d, J = 6)

4^G

69.9

3.26-3.36 (3H)

5^G

76.3

3.21 (1H, d, J = 5.52)

6^G

66.9

3.26-3.36 (3H)

1^R

100.7

4.37 (1H, d, J = 7.6)

2^R

70.3

3.04 (1H, d, J = 2.68)

3^R

70.5

3.69 (1H, d, J = 10.4)

4^R

71.8

3.26-3.36 (3H)

5^R

68.2

3.39 (1H, d, J = 1.76)

6^R

17.6

0.97 (3H, d, J = 6.12)