Kalaic Acid

Reference work entry

CAS Registry Number: 120396-52-3 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Ursene Type – Pomolic Acid

Biological source: Musanga cecropioides [1]

C37H60O8: 632.428 (Me ester)

IR (KBr) νmax cm−1(Me ester): 3525, 1730, 1630, 1380–1370 [1]

1H NMR (300 MHz, J/Hz, Me ester): 3.10 (dd, J = 11.0, 4.5, H-3), 1.93 (m, Hα-11), 1.93 (m, Hβ-11), 5.32 (sl, H-12), 1.60 (m, Hα-15), 1.00 (m, Hβ-15), 2.49 (m, Hα-16), 1.60 (m, Hβ-16), 2.56 (s, H-18), 0.88 (s, CH3-23), 0.74 (s, CH3-24), 0.89 (s, CH3-25), 0.64 (s, CH3-26), 1.22 (s, CH3-27), 1.19 (s, CH3-29), 0.92 (d, J = 6.6, CH3-30), 3.58 (s, OMe)

α-L-Rhap: 4.78 (s, H-1), 3.91 (sl, H-2), 3.75 (m, H-3), 3.42 (dd, J = 9.2, 9.2, H-4), 3.75 (m, H-5), 1.24 (d, J = 6.4, CH3-6) [1]

13 C NMR (75 MHz) (Me ester): [ 1]

Table 1

C-1

39.9

C-17

47.9

Rha-1

102.3

2

25.3

18

53.2

2

71.3

3

89.5

19

73.1

3

71.9

4

38.4

20

41.1

4

73.4

5

55.2

21

26.0

5

67.9

6

18.4

22

37.4

6

17.4

7

32.7

23

References

  1. 1.
    D. Lontsi, B.L. Sondengam, B. Bodo, M.T. Martin, Planta Med. 64, 189 (1998)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

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