Table 2 NMR spectroscopic data of 6β-hydroxyipolamiide18.

From: Antioxidant and α-glucosidase inhibitory activities of compound isolated from Stachytarpheta jamaicensis (L) Vahl. leaves

Position

δH

δc

HMBC

1

5.62 (1H, s)

93.2

3, 1’

3

7.31 (1H, s)

151.1

1, 4, 11

4

–

114.7

–

5

–

70.5

–

6

3.29 (1H, t)

73.4

–

7

2.02 (2H, m)

40.3

–

8

–

77.8

–

9

2.26 (1H, s)

61,2

1, 10, 5

10

0.96 (3H, s)

23.8

9

11

–

166.3

–

12

3.60 (3H, s)

51.3

11

1’

4.36 (1H, d)

98.4

1

2’

2.91 (1H, m)

73.4

1’

3’

3.11 (1H, m)

76.5

–

4’

3.04 (1H, m)

70.2

–

5’

3.02 (1H, m)

77.3

–

6’

3.65 (2H, m)

61.5

–

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