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2″-O-Acetyl Glycoside B

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Miscellaneous Glycosides – Hopan-28,22-lactone-17β,24-diol

Biological source: Diplazium subsinuatum [1]

C43H68O14: 808.460

Mp: 274–276°C (MeOH) [1]

[α]D −2.1° (c 1.0, C5H5N) [1]

IR (KBr) νmax cm−1: 3380, 2910, 1720, 1070, 1040 [1]

FAB-MSm/z: 807.4532 (M-H), 633 [M-H-CH2CO-Ara] [1]

EI-MSm/z: 472 (27, Agl)+, 454 (30), 441 (37), 410 (24), 385 (17), 207 (100), 189 (98), 109 (78) [1]

1H NMR (600 MHz, J/Hz, C5D5N): 0.79 (s, CH3-25), 1.12 (s, CH3-26), 1.17 (s, CH3-27), 1.23 (s, CH3-23), 1.26 (s, CH3-30), 1.50 (s, CH3-29), 3.87 (d, J = 9.5), 4.06 (d, J = 9.5, H2-24)

β-D-Glcp: 4.92 (d, J = 7.8, H-1), 4.23 (dd, J = 9.0, 7.8, H-2), 4.30 (dd, J = 9.0, 9.0, H-3), 4.18 (dd, J = 9.0, 9.0, H-4), 3.91 (ddd, J = 9.0, 4.8, 2.4, H-5), 4.53 (dd, J = 12.0, 2.4, H-6), 4.36 (dd, J = 12.0, 4.8, H-6)

α-L-Araf: 6.32 (s, H-1), 5.92 (d, J = 1.8, H-2), 4.91 (H-3), 5.03 (ddd, J = 4.2, 4.2, 4.2, H-4), 4.34...

References

  1. 1.
    T. Nakanishi, Y. Inatomi, M. Nishi, H. Murata, A. Inada, Chem. Pharm. Bull. 45(1), 8 (1997)CrossRefGoogle Scholar

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