Content:total ginkgo flavone glycosides: ≥24% Total Terpene Lactones≥6% ①quercetin C15H10O7 ②kaempferol C15H10O6 ③isorhamnetin C16H12O7 (include ginkgo lactones,ginkgo bitter lactones A,B,C)ginkgo lactonesC15H18O8 bitter lactones:A、C20H24O9 B、C20H24O10 C、C20H14O11 Loss on drying≤3% Heavy metals≤20ppm Arsenic≤2ppm Healthful Index：BY HPLC Packing:1.25KG per round board drum