Flavones≥ 24%/ Lactones ≥6%
Ginkgolic acid≤ 10ppm
Free Quercetin≤ 1.0%/Free Kaempferol ≤1.0%
Free Isorhamnetin≤ 0.4%
Quercetin/Kaempferol 0.8-1.2
Isohamnetin/Quercetin≥ 0.15
