Biflavonoids are a type of

flavonoid Flavonoids (or bioflavonoids; from the Latin word ''flavus'', meaning yellow, their color in nature) are a class of polyphenolic secondary metabolites found in plants, and thus commonly consumed in the diets of humans. Chemically, flavonoids ...

s with the general formula scheme (C6-C3-C6)₂.

Examples

* Amentoflavone (bis-apigenin coupled at 8 and 3' positions) * Lophirone L and lophirone M found in ''

Lophira alata ''Lophira alata'', commonly known as azobé, ekki or the red ironwood tree, is a species of plant in the family Ochnaceae. It is found in Cameroon, the Republic of the Congo, the Democratic Republic of the Congo, Ivory Coast, Equatorial Guinea, ...

'' *

Sulcatone A Sulcatone (6-methyl-5-hepten-2-one) is an unsaturated methylated ketone with the molecular formula C8H14O. It is a colorless, water-like liquid with a citrus-like, fruity odor. Sulcatone is one of a number of mosquito attractants, especially f ...

, a naturally occurring biflavonoid isolated from '' Ouratea sulcata''. Extracts of the leaves of this plant, used with and with other plant's extracts, are used in many African countries to treat some infections such as upper tract respiratory infections, dysenteria, diarrhoea and toothache. Positive antimicrobial activity has been shown in-vitro against ''

Staphylococcus aureus ''Staphylococcus aureus'' is a Gram-positive spherically shaped bacterium, a member of the Bacillota, and is a usual member of the microbiota of the body, frequently found in the upper respiratory tract and on the skin. It is often posi ...

'' and ''

Bacillus subtilis ''Bacillus subtilis'' (), known also as the hay bacillus or grass bacillus, is a gram-positive, catalase-positive bacterium, found in soil and the gastrointestinal tract of ruminants, humans and marine sponges. As a member of the genus ''Bacill ...

''. ''

Escherichia coli ''Escherichia coli'' ( )Wells, J. C. (2000) Longman Pronunciation Dictionary. Harlow ngland Pearson Education Ltd. is a gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus '' Escherichia'' that is commonly fo ...

'' showed to be resistant in the same study. * Hinokiflavone, a cytotoxic biflavonoid from ''

Toxicodendron succedaneum ''Toxicodendron succedaneum'', the wax tree, Japanese Hazenoki tree (Sumac or wax tree), sơn in Vietnamese or charão in Portuguese, is a flowering plant species in the genus ''Toxicodendron'' found in Asia, although it has been planted elsew ...

'', ''

Juniperus Junipers are coniferous trees and shrubs in the genus ''Juniperus'' ( ) of the cypress family Cupressaceae. Depending on the taxonomy, between 50 and 67 species of junipers are widely distributed throughout the Northern Hemisphere as far south ...

sp.'', or ''

Chamaecyparis obtusa ''Chamaecyparis obtusa'' (Japanese cypress, hinoki cypress or hinoki; or , ) is a species of cypress native to central Japan in East Asia, and widely cultivated in the temperate climate, temperate northern hemisphere for its high-quality timber ...

'' (hinoki). * Leaflets of ''

Cycas circinalis ''Cycas circinalis'', also known as the queen sago, is a species of cycad known in the wild only from southern India. ''Cycas circinalis'' is the only gymnosperm species found among native Sri Lankan flora. Taxonomy ''C. circinallis'' is nati ...

'' and '' C. revoluta'' contain biflavonoids such as (2''S'', 2′′''S'')-2,3,2′′,3′′-tetrahydro-4′,4′′′-di-''O''-methylamentoflavone ( tetrahydroisoginkgetin). * Agathisflavone * Cupressuflavone * Ginkgetin * Morelloflavone * Neorhusflavanone *

Ochnaflavone Ochnaflavone, a secondary plant secondary metabolite of the Biflavonoid family, has been widely investigated in past decades due to its unique ability to mediate biological activities, such as inhibition of phospholipase A2 and lymphocyte prolifer ...

* Podocarpusflavone A * Rhusflavone * Rhusflavanone * Robustaflavone * Sciadopitysin * Spicataside * Succedaneaflavanone * Volkensiflavone * Moghatin, extracted from '' Glossostemon bruguieri''

References

Flavonoids {{aromatic-stub