Table 1. Cytotoxicity of Umbelliprenin isolated from the seeds of Ferula sinkiangensis in three cell lines.

Compounds	IC50(μM)a
	AGS	BGC-823	GES-1
Umbelliprenin	11.74±1.33	24.62±2.45	97.55±3.81

^a IC50 is the concentration of compound causing 50% growth inhibition for each cell line after 24 h treatments. The results represent the mean values of three independent tests.