Ouratea

Flavumone A Dimers (chalcone-flavan) C30H20O10 Ouratea flava Ochnaceae 141... 

Mbing, J.N. et al.. Two biflavonoids from Ouratea flava stem bark. Phytochemistry, 63, 427, 2003. 

Ochna macrocalyx, rel. config., Ref. 13 Ouratea hexasperma, rel. config., Ref 30... 

Velandia, J.R. et al., Biflavonoids and a glucopyranoside derivative from Ouratea semiserrata, Phytochem. Anal, 13, 283, 2002. 

D arc Felicio, J. et al.. Inhibition of lens aldose reductase by biflavones from Ouratea spectabilis, Planta Med, 61, 217, 1995. 

Moreira, I.C. et al., Isoflavanone dimers hexaspermone A, B and C from Ouratea hexasperma. Phytochemistry, 35, 1567, 1994. 

Ouratea flava Schum and Thon. (stem bark) (1-2, 0,II-P 1-3, II-o0-Bichalcones (trisubstituted benzofuran derivatives) Calodenin B (338) flavumone A (339). Flavanone-chalcone (furochromanone derivative) Flavumone B (316). lophirone A (351). Mbing et al., 2003(307]. 

Ouratea multiflora Pohl (leaves) Biflavonol. I-5,7,4 -Tri-0-methylkaempferol-(I-6,II-8)-II-5,7,3, 4 -tetra-O-methylquercetin (111) amentoflavone (1). Ouratea species are used for treatment of rheumatic and gastric ailments. Inhibitory activity on aflatoxin Bj and B2 production, but did not inhibit fungal growth. Therefore, suitable for the control of aflatoxin production. Felicio et al., 2001[310] Gonyalez et al., 2001[311]. 

Ouratea semiserrata Mart (Engl.) (leaves and branches) Biflavones. I-7-O-Methyllanaroflavone (250) 1-7,11-4 -di-O-methyllanaroflavone (251) lanaroflavone (249) amentoflavone (1) podocarpusflavone A (6). Amentoflavone and its aeetyl derivative are inhibitors of human DNA topoisomerases 1 at 200 pM. These biflavonoids showed concentration-dependent growth inhibitory activities on Ehrlich carcinoma cells in 45-h culture. These biflavonoids are targets for DNA topoisomerases and their cytotoxicity is dependent on tumor cell type. Lanaroflavone is an active antiplasmodial compound Velandia et al., 2002[313] Grynber g et al., 2002[48] Weniger et al., 2006[86]. 

Ouratea spectabilis (Mart.) Engl, (leaves) Succedaneaflavones [(1-6,11-6)-Biflavones]. (I-6,II-6)-Bigenkwanin (115) I-7,II-7-di-0-methylagathisflavone (104). Biflavones inhibited lens aldose reductase. The biflavonoids showed inhibitory activity on aflatoxin Bj and B2 production, but did not inhibit fungal growth at the concentration tested. Therefore, biflavonoids can be used for the development of agents to control aflatoxin production. Felicio et al., 1995[100]. Gon9alez et al., 2001 [311]. 

Ouratea staudtii Van Tiegh. Ex Keay. (aerial parts) Lophirone A (351) amentoflavone (1) ochnaflavone (218) bilobetin (3) podocarpusflavone A (6) agathisflavone (100). Abouem a Zintchem etal.,2007[314]. 

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