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Octasubstituted flavones from Ageratum houstonianum

1985; Elsevier BV; Volume: 24; Issue: 5 Linguagem: Inglês

10.1016/s0031-9422(00)83188-x

1873-3700

Leovigildo Quijano, José S. Calderón, Federico Gómez Galindo, Edgar Escobar, Tirso Ríos,

Biological Activity of Diterpenoids and Biflavonoids

Two new highly oxygenated flavones, were isolated from aerial parts of Ageratum houstonianum. Their structures were established as 3′-hydroxy-5,6,7,8,2′,4′,5′-heptamethoxyflavone and 5,3′-dihydroxy-6,7,8,2′,4′,5′-hexamethoxyflavone on the basis of spectral data and chemical degradation. The structure of the latter compound was confirmed by X-ray analysis.