Table 7.

The inhibitory effect of all compounds on rabbit platelet aggregation induced by PAF (0.4 µg/mL)^a

Compound	Concentration (µg/mL)	Inhibition (%)b
11 c	900	84.9 ± 7.0
	600	66.8 ± 3.9
	300	36.4 ± 3.1
	150	21.9 ± 6.6
	75	10.7 ± 8.5
14 c	800	68.1 ± 12.6
	600	51.2 ± 12.7
	300	20.4 ± 7.1
	150	10.9 ± 0.6
	75	6.0 ± 2.6
15 c	900	73.3 ± 14.6
	600	50.4 ± 6.7
	300	33.6 ± 5.1
	150	23.9 ± 9.6
	75	18.3 ± 7.4
20	300	16.8 ± 6.7
25	300	17.0 ± 7.6
Ginkgolide Bd	25	90.2 ± 10.4
	12.5	56.9 ± 11.2
	6.25	33.9 ± 9.3
	3.125	19.5 ± 9.6
	1.5625	9.0 ± 5.2

^aThe inhibition of other tested compounds (1–10, 12, 13, 16–19, 21–24, and 26–37) was less than 10% at the concentration of 300 µg/mL

^bmean ± SD, n = 3

^cThe IC₅₀ values of 11, 14, and 15 was 470.3 ± 51.6 µg/mL, 614.9 ± 113.5 µg/mL, and 579.7 ± 139.1 µg/mL, respectively

^dPositive control (IC₅₀ = 12.2 ± 2.8 µg/mL)