LABDANE DERIVATIVES AND FLAVONES FROM GUTIERREZIA DRACUNCULOIDES

Article abstract of DOI:10.1016/0031-9422(81)85226-0

Key Word Index - Guiterrezia dracunculoids; Compositae; new labdane derivatives; new flavones. An investigation of the aerial parts of Gutierrezia dracunculoides afforded, in addition to known compounds, three new labdan derivatives, all related to lambertianic acid, 17-hydroxy- and 17-acetoxylambertianic acid and 7α-hydroxylambertianic acid, two esterifid and tree highly oxygnated flavones, 5,7,4'-trihydroxy-3,3'-dimethoxy-flavone-4'-O-<2-methylbutyrate> and isovalerate, 3',5'-dihydroxy-3,5,6,7,8,4'hexamethoxyflavone, 5,3',5'-trihydroxy-3,6,7,8,4'-pentamethoxyflavone and 5,7,3'5'-tetrahydroxy-3,6,8,4-tetramethoxyflavone.The structures were elucidated by spectroscopic methods and a few chemical transformations.