Position

IC₅₀ μM^a

CNE-2

A549

HepG2

HCT-116

1

>50

>50

>50

>50

2

13.57 ± 1.02

42.32 ± 2.21

11.21 ± 1.13

15.23 ± 1.42

3

>50

>50

>50

>50

4

>50

>50

>50

>50

5

>50

>50

>50

>50

6

>50

>50

>50

>50

Doxorubicin^b

0.52 ± 0.13

3.12 ± 0.23

0.83 ± 0.22

0.42 ± 0.11