Two biflavonoids from Ouratea nigroviolacea.
The leaves of Ouratea nigroviolacea (Ochnaceae) afforded two biflavonoids, ouratine A and B together with agathisflavone and stigmasterol. The biflavonoids were characterized as 4'-O-methylated apigeninyl-(I-6, II-8)-4'-O-methylatedapigenin and 4'-O-methylated apigeninyl-(I-6, II-8) apigenin by spectral and chemical transformation studies.
Ngo Mbing
Josephine
J
Department of Organic Chemistry, Faculty of Science, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon.
Enguehard-Gueiffier
Cécile
C
Atchadé
Alex de Théodore
Ade T
Allouchi
Hassan
H
Gangoué-Piéboji
Joseph
J
Mbafor
Joseph Tanyi
JT
Tih
Raphael Ghogomu
RG
Pothier
Jacques
J
Pegnyemb
Dieudonné Emmanuel
DE
Gueiffier
Alain
A
D044946:Biflavonoids / Q000737:chemistry* / Q000302:isolation & purification; D015394:Molecular Structure; D043842:Ochnaceae / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification; D014961:X-Ray Diffraction
D044946:Biflavonoids; D010936:Plant Extracts; C519047:ouratine A; C519048:ouratine B