Table 1.

Inhibitory concentrations (50%) of 7-ethyl-10-hydroxycamptothesin (SN-38), paclitaxel (TXL), and cisplatin (CDDP) in PC-6 and NCI-H69 small-cell lung cancer cells

	PC-6	PC-6/SN-38	RR
SN-38	0.98 pM	4.48 nM	4571.42
	PC-6	PC-6/TXL	RR
TXL	23.75 pM	11.05 nM	465.26
	PC-6	PC-6/CDDP	RR
CDDP	8.34 nM	15.02 μM	1800.95
	NCI-H69	NCI-H69/TXL	RR
TXL	0.028 pM	13.12 pM	468.57

RR, relative rate.