Cyathenosin A, a spiropyranosyl derivative of protocatechuic acid from Cyathea phalerata.

@article{Pizzolatti2007CyathenosinAA,
  title={Cyathenosin A, a spiropyranosyl derivative of protocatechuic acid from Cyathea phalerata.},
  author={Moacir Geraldo Pizzolatti and In{\^e}s Maria Costa Brighente and Ada{\'i}lton Jo{\~a}o Bortoluzzi and Jan Schripsema and Luiz Gonzaga Verdi},
  journal={Phytochemistry},
  year={2007},
  volume={68 9},
  pages={1327-30}
}
Cyathenosin A, a spiropyranosyl derivative of protocatechuic acid was isolated from the stem pith of Cyathea phalerata Mart. Its structure was determined by MS, 1D and 2D NMR spectroscopic analyses and confirmed by single crystal X-ray analysis. Cyathenosin A is the first example of a naturally occurring compound containing a spirocyclic orthoester pyranosidic structure. 

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