X-Ray Crystal Structure Analysis of Oxin
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Gerhard Laus; Klaus Wurst
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Article
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2003
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John Wiley and Sons
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German
β 124 KB
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## Abstract The singleβcrystal Xβray structures of speciophylline, mitraphylline, and rhynchophylline, oxindole alkaloids from the Peruvian climbing vine __Uncaria tomentosa__ (Rubiaceae), were determined. The three compounds show Nβ β β Hο£ΏN hydrogen bonding, which has not been observed in the crystal