SIX 2'-HYDROXYFLAVONOLS FROM GUTIERREZIA MICROCEPHALA

Article abstract of DOI:10.1016/0031-9422(85)80050-9

Six 2'-hydroxyflavonols were isolated from Gutierrezia microcephala, including four new compounds, 5,7,2'-trihydroxy-3,6,4',5'-tetramethoxyflavone, 5,7,2'-trihydroxy-3,6,8,4',5'-pentamethoxyflavone, 5,2'-dihydroxy-3,6,7,8,4',5'-hexamethoxyflavone and 5,7,2',4'-tetrahydroxy-3,8,5'-trimethoxyflavone and two known compounds, 5,7,2',5'-tetrahydroxy-3,6,8,4'-tetramethoxyflavone and 5,7,2',4'-tetrahydroxy-3,6,8,5'-tetramethoxyflavone.Key Word Index - Gutierrezia microcephala; Compositae; Astereae; new flavonol 3-O-methyl ethers; 5,7,2'-trihydroxy-3,6,4'5'-tetramethoxyflavone; 5,7,2'-trihydroxy-3,6,8,4',5'-pentamethoxyflavone, 5,2'-dihydroxy-3,6,,8,4',5'-hexamethoxyflavone; 5,7,2',4'-tetrahydroxy-3,8,5'-trimethoxyflavone.