Table 1.

The IC50 (μg/ml) of PSs in PC-9-ZD cells.

	24 h	48 h	72 h
PS I	2.51	2.07	1.53
PS II	3.12	2.65	2.29
PS VI	4.21	3.68	2.72
PS VII	3.57	2.41	1.85