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Botanical Studies

Table 1 Summarizes pertinent 1 H and 13 C NMR spectral data and assignments

From: Chemical characterization and antioxidative activity of four 3-hydroxyl-3-methylglutaroyl (HMG)-substituted flavonoid glycosides from Graptopetalum paraguayense E. Walther

Position

Compound 1

Compound 2

Compound 3

Compound 4

(in Acetone-d6)

(in Acetone-d6)

(in Acetone-d6)

(in Acetone-d6)

 

δ H

δ C

δ H

δ C

δ H

δ C

δ H

δ C

2

 

158.4

 

158.6

 

158.0

 

158.1

3

 

135.2

 

133.3

 

134.4

 

134.2

4

 

178.9

 

177.4

 

178.5

 

178.6

5

 

162.6

 

161.2

 

162.8

 

162.8

6

6.28 (1H, d, 1.8)

99.5

6.28 (1H, d, 1.8)

98.8

6.26 (1H, d, 1.8)

99.4

6.26 (1H, d, 1.8)

98.2

7

 

165.1

 

164.2

 

164.8

 

164.8

8

6.52 (1H, d, 1.8)

94.6

6.52 (1H, d, 1.8)

93.7

6.49 (1H, d, 1.8)

94.4

6.50 (1H, d, 1.8)

93.5

9

 

157.8

 

156.5

 

157.8

 

157.8

10

 

105.4

 

104.1

 

105.5

 

103.1

1’

 

122.7

 

120.9

 

122.8

 

121.7

2’

7.77(1H, d, 1.8)

117.2

8.12 (1H, d, 9.0)

130.7

7.76(1H, d, 2.4)

117.1

8.08 (1H, d, 9.0)

132.0

3’

 

145.2

6.96 (1H, d, 8.4)

115.1

 

145.2

6.97 (1H, d, 9.0)

115.4

4’

 

149.1

 

160.0

 

148.9

 

160.8

5’

6.94 (1H, d, 8.4)

115.6

6.96 (1H, d, 8.4

115.1

6.95 (1H, d, 8.4)

115.7

6.97 (1H, d, 9.0)

115.4

6’

7.68 (1H, dd, 1.8,8.4)

123.1

8.12 (1H, d, 9.0)

130.7

7.63 (1H, dd, 2.4,8.4)

123.0

8.08 (1H, d, 9.0)

132.0

1”

5.30 (1H, d, 7.2)

104.2

5.28 (1H, d, 7.8)

101.3

5.61 (1H, d, 7.8)

100.2

5.62 (1H, d, 7.8)

100.1

2”

3.40-3.52 (1H, m)

75.2

3.45 (1H, dd, 7.8, 9.0)

74.1

5.01 (1H, dd, 7.8, 9.6)

75.0

4.97 (1H, dd, 8.4, 9.6)

74.8

3”

3.40-3.52 (1H, m)

77.7

3.40 (1H, t, 9.0)

76.4

3.70 (1H, t, 9.0)

75.3

3.68 (1H, t, 9.0)

75.2

4”

3.40-3.52 (1H, m)

70.6

3.48-3.54 (1H, m)

70.1

3.42 (1H, dd, 9.0, 9.6)

71.0

3.46 (1H, dd, 9.0, 9.6)

71.2

5”

3.40-3.52 (1H, m)

75.1

3.48-3.54 (1H, m)

74.1

3.55 (1H, dd, 1.8, 7.8)

74.9

3.54 (1H, dd, 1.8, 7.8)

75.0

6”

4.11 (1H, dd, 5.4, 12.0)

64.0

4.10 (1H, dd, 6.0, 12.0)

63.2

4.12 (1H, dd, 5.4, 12.0)

63.7

4.10 (1H, dd, 5.4, 12.0)

63.8

4.22 (1H, dd, 1.8, 12.0)

4.22 (1H, dd, 1.8, 12.0)

4.24 (1H, dd, 1.8, 12.0)

4.22 (1H, dd, 1.8, 12.0)

1”’

 

171.6

 

170.0

 

171.5

 

171.4

2”’

2.52 (1H, d, 14.4, H-2”’A or H-2”’B)

45.7

2.51 (1H, d, 14.4, H-2”’A or H-2”’B)

45.7

2.51 (1H, d, 13.8, H-2”’A or H-2”’B)

45.7

2.48 (1H, d, 13.8, H-2”’A or H-2”’B)

45.7

2.56 (1H, d, 14.4, H-2”’A or H-2”’B )

2.56 (1H, d, 14.4, H-2”’A or H-2”’B )

2.54 (1H, d, 13.8, H-2”’A or H-2”’B )

2.51 (1H, d, 13.8, H-2”’A or H-2”’B )

3”’

 

69.9

 

68.7

 

69.9

 

69.9

4”’

2.50 (1H, d, 15.6, H-4‘”A or H-4”’B)

45.1

2.52 (1H, d, 15.6, H-4”’A or H-4”’B)

44.9

2.48 (1H, d,15.6, H-4”’A or H-4”’B)

45.1

2.47 (1H, d, 15.6, H-4”’A or H-4”’B)

45.0

2.59 (1H, d, 15.6, H-4”’A or H-4”’B)

2.59 (1H, d, 15.6, H-4”’A or H-4”’B)

2.56 (1H, d, 15.6, H-4”’A or H-4”’B)

2.54 (1H, d, 15.6, H-4”’A or H-4”’B)

5”’

 

173.6

 

172.2

 

173.5

 

173.4

6”’

1.23 (3H, s)

27.5

1.24(3H, s)

27.0

1.20 (3H, s)

27.5

1.19 (3H, s)

27.4

1””

     

170.5

 

170.3

2””

    

2.10 (3H, s)

21.1

2.10 (3H, s)

21.0

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