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    • (25R)-Isonuatigenin, an unusual steroidal sapogenin from Vestia lycioides 

      Faini, Francesca; Torres, René; Castillo, Mariano (1984)
      (25R)-Isonuatigenin, a 5-spirosten-3β,25-diol, was isolated from aerial parts of Vestia lycioides. Its structure was elucidated mainly by 1H NMR and 13C NMR spectroscopy. A mixture of (25R)-nuatigenin and (25S)-isonuatigenin ...