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Theasaponin E2

Reference work entry

CAS Registry Number: 220114-30-7 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Oleanene Type – Theasapogenol E

Biological source: Camellia sinensis [1]

C59H90O27: 1230.556

Mp: 240–242°C [1]

[α]D25 + 22.2° (c 1.2, MeOH) [1]

IR (KBr) νmax cm−1: 3420, 2920, 1716, 1614, 1384 [1]

LSI-MSm/z: 1253 (M + Na)+, 1269 (M + K)+ [1]

1H NMR (C5D5N): 0.86, 0.91, 1.07, 1.28, 1.44, 1.69 (s, CH3-25, 26, 29, 30, 24, 27), 2.01 (s, CH3-5 of Ang), 2.07 (d, J = 6.8, CH3-4 of Ang), 2.11 (s, Ac-CH3-2), 5.46 (brs, H-12), 6.03 (dq-like, H-3 of Ang), 6.28 (d, J = 8.8, H-21), 9.75 (s, H-23)

β-D-GlcUAp: 4.75 (d, J = 6.8, H-1)

β-D-Galp: 5.53 (d, J = 7.3, H-1)

β-D-Xylp: 5.06 (d, J = 6.8, H-1)

α-L-Arap: 5.61 (d, J = 5.6, H-1) [1]

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

Table 1

C-1

38.3

C-18

40.5

GlcUA-1

104.2

Xyl-1

107.0

2

25.3

19

47.3

2

78.3

2

75.9

3

84.5

20

36.5

3

84.4

3

78.1

4

55.3

21

81.5

4

70.9

4

70.9

5

48.4

22

71.4

5

77.3

5

67.5

6

20.5

23

209.8

References

  1. 1.
    I. Kitagawa, K. Hori, T. Motozawa, T. Murakami, M. Yoshikawa, Chem. Pharm. Bull. 46(12), 1901 (1998)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

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