Table 2.

Immunosuppressive effects of compounds 1–9 and azathioprine on the Con A–induced and LPS-induced proliferations of mouse splenic lymphocytes ^a.

Compounds	IC50 (μg/mL)
	Con A-Induced	LPS-Induced
1	8.1	9.3
2	17.5	23.7
3	8.2	7.5
4	25.7	26.4
5	5.9	7.5
6	19.2	20.8
7	6.5	7.1
8	30.1	32.4
9	30.8	31.2
Azathioprine	2.7	2.7

^a The data shown here were from a representative experiment repeated three times with similar results.