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  • Title: Two new steroidal saponins from the rhizomes of Dioscorea zingiberensis.
    Author: Zheng L, Zhou Y, Zhang JY, Song M, Yuan Y, Xiao YJ, Xiang T.
    Journal: Chin J Nat Med; 2014 Feb; 12(2):142-7. PubMed ID: 24636066.
    Abstract:
    AIM: To investigate the chemical constituents of Dioscorea zingiberensis C. H. Wright. METHODS: The compounds were isolated by various chromatographic techniques, and the structures of the new steroidal saponins were elucidated by extensive 1D- and 2D-NMR, MS, and IR spectral analysis. RESULTS: The 70% EtOH extract of the rhizomes of Dioscorea zingiberensis afforded two new steroidal saponins, zingiberenosides A (1) and B (2), along with eight known analogues, 3β, 26-dihydroxy-25(R)-furosta-Δ(5, 20(22))-diene-3-O-α-L- rhamnopyranosyl-(1→2)-O-β-D-glucopyranoside (3), methyl parvifloside (4), deltoside (5), methyl deltoside (6), zingiberensis new saponin (7), deltonin (8), progenin III (9) and diosgenin-diglucoside (10). CONCLUSION: Two new steroidal saponins were isolated from Dioscorea zingiberensis and their structures determined.
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