DEFINITION

Ginkgo consists of the dried leaf of Ginkgo biloba L. (Fam. Ginkgoaceae). It contains NLT 0.5% of flavonoids, calculated as flavonol glycosides, and NLT 0.1% of terpene lactones, calculated as the sum of bilobalide (C₁₅H₁₈O₈), ginkgolide A (C₂₀H₂₄O₉), ginkgolide B (C₂₀H₂₄O₁₀), and ginkgolide C (C₂₀H₂₄O₁₁), both on the dried basis.