Ginkgo biloba apigenin from

Biflavonyls have a C30 skeleton. They are dimers of flavones such as apigenin or methylated derivatives and are found in gymnospcrms. Few compounds are known. The most familiar is ginkgetin (1.57) from Ginkgo biloba (fossil tree or Japanese silver apricot). 

Diastereomers of four flavinoids (naringin, pnmin, neohesperidin, narirutin) were resolved on a ) -cyclodextrin column (A = 280 nm) using a 20-min 95/5 - 50/50 (90/10/0.5 methanol/water/acetic acid)/(95/5 methanol/water) gradient [371]. Nine flavanoids [372] extracted from Ginkgo biloba leaves (quercetin, apigenin. 

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