Table 2.

Selectivity Index (SI) of ECL Against Three Different NSCLC Cells (A549, COR-L23, and Calu-1) Compared to the Normal Lung Fibroblast (WI-38)

Treatment Time	A549	COR-L23	Calu-1
24 h	4.59	3.70	<0.93
48 h	2.62	3.61	0.77
72 h	2.37	2.51	1.65

Selectivity index (SI) = IC₅₀ of ECL in a normal cell line (WI-38)/IC₅₀ of the ECL in cancer cell line (NSCLC cells).