Theasaponin E1

Reference work entry

CAS Registry Number: 220114-28-3 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: 1230.566

Mp: 246–248°C [1]

[α]D25 + 8.9° (c 1.1, MeOH) [1]

IR (KBr) νmax cm−1: 3433, 2923, 1724, 1616, 1361, 1261, 1040 [1]

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

1H NMR (C5D5N): 0.83, 0.84, 1.08, 1.31, 1.46, 1.78 (s, CH3-25, 26, 29, 30, 24, 27), 1.94 (s, Ac-CH3-2), 2.02 (s, CH3-5 of Ang), 2.10 (d, J = 7.0, CH3-4 of Ang), 5.39 (brs, H-12), 5.99 (dq-like, H-3 of Ang), 6.16 (d, J = 10.1, H-22), 6.57 (d, J = 10.1, H-21), 9.89 (s, H-23)

β-D-GlcUAp: 4.84 (d, J = 7.3, H-1)

β-D-Galp: 5.72 (d, J = 7.6, H-1)

β-D-Xylp: 5.00 (d, J = 7.6, H-1)

α-L-Arap: 5.70 (d, J = 6.5, H-1) [1]

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

Table 1

C-1

38.3

C-18

40.2

GlcUA-1

104.1

Xyl-1

107.0

2

25.2

19

47.2

2

78.4

2

75.9

3

84.5

20

36.3

3

84.2

3

78.2

4

55.2

21

78.9

4

70.8

4

70.8

5

48.4

References

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

Copyright information

© Springer Science+Business Media New York 2013

Personalised recommendations