Table 1. Factors and levels of L9 (3⁴) orthogonal test.

Run	Bre (mg)	E80 (mg)	MCT (mg)	ODA (mg)
1	8	100	20	4
2	8	120	40	6
3	8	140	60	8
4	10	100	40	8
5	10	120	60	4
6	10	140	20	6
7	12	100	60	6
8	12	120	20	8
9	12	140	40	4

Bre, breviscapine; E80, egg yolk lecithin 80; MCT, medium-chain fatty acid esters; ODA, octadecylamine