87402-97-9Relevant articles and documents
FLAVONOIDS FROM AGERATUM CORYMBOSUM
Quijano, Leovigildo,Gomez-Garibay, Federico,Garcia-Perez, Guillermina,Rios, Tirso
, p. 2859 - 2862 (2007/10/02)
Investigation of a new collection of Ageratum corymbosum resulted in the isolation of three new flavonoids, 4'-hydroxy-5,6,7,3'tetramethoxyflavanone, 5-hydroxy-6,7,2',3',4',5'-hexamethoxyflavone and 3'-hydroxy-5,6,7,2',4',5'-hexamethoxyflavone, named agecorynins E, F and G, respectively.Their structures were established by spectral methods and chemical transformations. 5-Hydroxy-7,8,2',3',4',5'-hexamethoxyflavone (isoagerocorynin F), obtained from agehoustin B, is also reported. Key words: Ageratum corymbosum; Asteraceae; Eupatoriae; flavones; flavanones; heptasubstituted and hexasubstituted flavones.
Synthetic studies on the flavone derivatives. XIII. Synthesis of flavones with tetramethoxyl groups in ring B
Iinuma,Tanaka,Matsuura
, p. 3354 - 3360 (2007/10/02)
2',3',4',5,5',6,7,8-Octamethoxy- (Ia) and 2',3',4',5,5',6,7-heptamethoxyflavone (IIa) and their position isomers substituted with tetramethoxyl groups in ring B were synthesized to confirm the structures of agehoustin A and agehoustin B isolated from Ageratum houstonianum. The characteristics of the synthesized flavones were investigated by spectroscopic methods.