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Goyaglycoside-b

Reference work entry

CAS Registry Number: 333332-48-2 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Cucurbitane Type – 19(R)-Methoxy-5β,19-epoxy-cucurbita-6,23-diene-3β,25-diol

Biological source: Momordica charantia [1]

C37H60O9: 648.423

[α]D23−110.7° (c 0.5, MeOH) [1]

IR (KBr) νmax cm−1: 3428, 1086, 1032 [1]

FAB-MSm/z: 647 [M-H], 455 [M-CH3O-C6H11O5]; 649 [M + H]+ [1]

1H NMR (270 MHz, J/Hz, C5D5N): 0.83 (CH3-29), 0.89 (CH3-30), 0.90 (s, CH3-18), 0.98 (d, J = 5.3, CH3-21), 1.44 (CH3-28), 1.54 (CH3-26), 1.54 (CH3-27), 3.13 (dd-like, H-8), 3.50 (CH3O-19), 3.70 (brs, H-3), 4.88 (s, H-19), 5.61 (dd, J = 3.3, 9.6, H-7), 5.92 (m, H-23), 5.92 (m, H-24), 6.15 (dd, J = 2.0, 9.6, H-6)

β-D-Allp: 5.44 (d, J = 7.6, H-1) [1]

13 C NMR (68 MHz, C 5D 5N): [ 1]

Table 1

C-1

18.7

C-16

28.2

All-1

102.5

2

27.4

17

50.4

2

73.7

3

83.6

18

14.9

3

71.8

4

39.1

19

112.5

4

69.3

5

85.6

20

36.6

5

76.4

6

133.2

21

18.9

6

63.3

7

131.6

22

39.6

   

8

42.3

23

References

  1. 1.
    T. Murakami, A. Emoto, H. Matsuda, M. Yoshikawa, Chem. Pharm. Bull. 49(1), 54 (2001)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

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