Related Experiment Videos
Pentaoxygenated xanthones and fatty acids from Bredemeyera brevifolia
M C de Oliveira1, E R Silveira
1Departamento de Química Orgânica e Inorgânica, Centro de Ciências, Universidade Federal do Ceará, Fortaleza, Brazil.
Phytochemistry
|February 24, 2001
Abstract:
The polar portion of an ethanol extract of Bredemeyera brevifolia yielded two pentaoxygenated xanthones whose structures were determined as 1-methoxy-2,3,7,8-dimethylenedioxyxanthone, and 1,7,8-trimethoxy-2,3-methylene-dioxyxanthone. The apolar fraction contained various known fatty acids, structure determinations were accomplished by spectral analysis, mainly NMR, chemical derivatization and comparison to literature values.