Amentoflavone is a biflavonoid (bis-apigenin coupled at 8 and 3 positions, or 3,8-biapigenin) constituent of a number of plants including Ginkgo biloba, Chamaecyparis obtusa (hinoki), Biophytum sensitivum, Selaginella tamariscina, Hypericum perforatum (St. John's Wort) and Xerophyta plicata.
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