Two biflavonoids from Ouratea flava stem bark.
In a chemical investigation on the stem bark of Ouratea flava, two biflavonoids: 1-[3-(2,4-dihydroxy-benzoyl)-4,5,6-trihydroxy-2-(4-hydroxy-phenyl)-benzofuran-7-yl] -3-(4-hydroxy-phenyl) -propenone (flavumone A) and 3-(2,4-dihydroxy-benzoyl)-4-hydroxy-2,7-bis-(4-hydroxy-phenyl) -7,8- dihydro-furo[2,3-f]chromen-9-on (flavumone B) were isolated along with five known flavonoids. Their structures were established by various analyses including 2D-NMR spectroscopy.
Mbing
Joséphine Ngo
JN
Centre de Recherches en Plantes Médicinales et Médecine Traditionnelle, I.M.P.M., B.P. 6163, Yaoundé, Cameroon.
Pegnyemb
Dieudonné Emmanuel
DE
Tih
Raphael Ghogomu
RG
Sondengam
Beibam Lucas
BL
Blond
Alain
A
Bodo
Bernard
B
D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D019906:Nuclear Magnetic Resonance, Biomolecular; D024301:Plant Bark / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry; D019685:Rosales / Q000737:chemistry*
D005419:Flavonoids