Table 3. Plasma concentrations of (S)-YK-4-279 at 20 minutes following IP injection of 200 mg/kg of YK-4-279 (racemic mixture) in various formulations to C57BL/6 mice.

Five mice were used for each formulation, and mean (±SD) concentrations of (S)-YK-4-279 are shown in the table

Vehicle	% Lecithin	% DMSO	% Soybean Oil	(S)-YK-4-279 Concentrations (¼M)
10% w/v sucrose, 1% v/v Tween 80, 5% v/v ethanol, lecithin (variable), soybean oil (variable), DMSO (variable) in DI water	0.25	0	0	10.5 ± 8.6
	1.2	0	10	20.9 ± 22.8
	2.5	0	10	19.8 ± 20.5
	1.2	10	0	35.8 ± 45.0
	1.2	10	10	39.1 ± 54.6
	2.5	10	0	59.7 ± 58.6
	2.5	10	10	21.3 ± 11.3