Flavones 22%-27%/ Lactones 5.4%-12.0%
BB 2.6%-5.8% Ginkgolic acid≤ 5ppm
Free Quercetin≤ 0.5% Rutin≤ 4%
Lactones(a+b+c) 2.8%-6.2%
Quercetin/Kaempferol ≥0.7
Isorhamnetin/Quercetin ≥0.1
