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5″-O-Acetyl Glycoside C

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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]

C49H78O19: 970.513

Mp: 271–273°C (MeOH) [1]

[α]D + 14.1° (c 1.0, C5H5N) [1]

FAB-MSm/z: 969.5085 (M-H), 927 [M-H-CH2-CO], 807 [M-H-Glc], 795 [927-Ara], 765 [927-Glc], 633 [795-Glc] [1]

EI-MSm/z: 472 (9, Agl)+, 454 (15), 441 (18), 410 (16), 358 (10), 207 (100), 189 (63), 109 (48) [1]

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

1H NMR (600 MHz, J/Hz, C5D5N): 0.86 (s, CH3-25), 1.15 (s, CH3-26), 1.17 (s, CH3-27), 1.24 (s, CH3-23), 1.26 (s, CH3-30), 1.49 (s, CH3-29), 3.86 (d, J = 9.5), 4.12 (d, J = 9.5, H2-24)

β-D-Glcp: 4.83 (d, J = 7.8, H-1), 4.09 (dd, J = 9.0, 7.8, H-2), 4.20 (H-3), 4.02 (H-4), 4.02 (H-5), 4.77 (d, J = 10.8, H-6), 4.29 (dd, J = 10.8, 5.4, H-6)

α-L-Araf: 6.38 (s, H-1), 5.01 (d, J = 3.0, H-2), 4.62 (dd, J = 5.4, 3.0, H-3), 4.97 (ddd, J = 6.0, 5.4, 3.6,...

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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© Springer Science+Business Media New York 2013

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