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1 .     viburnudienone B1 methyl ester
C31H46O5     ÏàËÆ¶È:51.6%
Chemical & Pharmaceutical Bulletin          1999          47          692-694
Studies on the Constituents of Viburnum Species. XIX. Six New Triterpenoids from Viburnum dilatatum THUNB.
Koichi MACHIDA and Masao KIKUCHI
Structure      13C NMR   Ì¼Æ×Ä£Äâͼ

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2 .     viburnenone B1 methyl ester
C31H48O6     ÏàËÆ¶È:51.6%
Chemical & Pharmaceutical Bulletin          1999          47          692-694
Studies on the Constituents of Viburnum Species. XIX. Six New Triterpenoids from Viburnum dilatatum THUNB.
Koichi MACHIDA and Masao KIKUCHI
Structure      13C NMR   Ì¼Æ×Ä£Äâͼ

--------------------------------------------------------------------------------

3 .     compound 2a
    ÏàËÆ¶È:50%
Phytochemistry          1992          31          2805-2807
Triterpenoid saponins from leaves of Castanospermum australe
Viqar Uddin Ahmad, Waseemuddin Ahmed, Khan Usmanghani
Structure      13C NMR   Ì¼Æ×Ä£Äâͼ

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