Eupteleasaponin II

Reference work entry

CAS Registry Number: 290809-30-2 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Oleanene Type – Akebonoic Acid

Biological source: Euptelea polyandra [1]

C58H92O25: 1188.592

Mp: 191–193°C [1]

[α]D28 + 14.3° (c 0.1, MeOH) [1]

IR (KBr) νmax cm−1: 3410, 1736, 1655, 1078 [1]

FAB-MS (negative ion mode) m/z: 1187 (M-H), 1041 (M-C6H11O4), 1025 (M-C6H11O5) [1]

FAB-MS (positive ion mode) m/z: 1211 (M + Na)+ [1]

1H NMR (500 MHz, J/Hz, C5D5N): 0.87, 1.07, 1.11, 1.21, 1.24 (s, CH3-25, 26, 24, 23, 27), 3.11 (dd, J = 4.5, 12.8, H-18), 3.31 (dd, J = 3.9, 11.9, H-3), 4.68, 4.75 (s, H2-29), 5.44 (brs, H-12)

β-D-Xylp: 4.85 (d-like, H-1)

β-D-Glcp: 5.01 (d, J = 7.9, H-1)

β-D-Glcp′: 6.24 (d, J = 7.9, H-1)

α-L-Rhap: 6.05 (brs, H-1), 1.62 (d, J = 6.1, CH3-6)

α-L-Rhap′: 5.77 (brs, H-1), 1.68 (d, J = 6.1, CH3-6) [1]

13 C NMR (125 MHz, C 5D 5N): [ 1]

Table 1

C-1

39.1

C-16

23.8

Xyl-1

104.7

Rha-5

70.1

2

26.6

17

47.4

2

74.9

6

18.5...

References

  1. 1.
    M. Yoshikawa, T. Murakami, H. Oominami, H. Matsuda, Chem. Pharm. Bull. 48(7), 1045 (2000)CrossRefGoogle Scholar

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